Quectel Wireless Solutions 201312UC20 UMTS/HSPA+ Module User Manual

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201312UC20 User Manual

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UC20 Hardware Design UMTS/HSPA Module Series Rev. UC20_Hardware_Design_V1.2 Date: 2014-01-13 www.quectel.com

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 1 / 84 Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters: Quectel Wireless Solutions Co., Ltd. Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233 Tel: +86 21 5108 6236 Mail: info@quectel.com Or our local office, for more information, please visit: http://www.quectel.com/support/salesupport.aspx For technical support, to report documentation errors, please visit: http://www.quectel.com/support/techsupport.aspx GENERAL NOTES QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION. THE INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE. COPYRIGHT THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT AS WELL AS UTILIZATION OF THIS CONTENTS ARE FORBIDDEN WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL OR DESIGN. Copyright © Quectel Wireless Solutions Co., Ltd. 2014. All rights reserved.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 2 / 84 About the Document History Revision Date Author Description 1.0 2013-07-17 Mountain ZHOU Initial 1.1 2013-08-29 Mountain ZHOU 1. Updated USB driver information. 2. Added GNSS contents in Chapter 4. 3. Added GNSS current consumption. 4. Updated GNSS antenna requirements. 5. Released USIM_PRESENCE function. 1.2 2014-01-13 Mountain ZHOU 1. Added UC20-G information. 2. Added AMR-WB feature. 3. Added USB upgrade test points’ diagram. 4. Added reference design of transistor circuit on UART interface. 5. Deleted debug function of Debug UART interface. 6. Released AP_READY, UART upgrade function and Rx-diversity function. 7. Modified UC20-A frequency bands. 8. Modified W_DISABLE# definition. 9. Modified USIM pin’s electrical characteristics. 10. Modified GNSS sensitivity definition. 11. Modified turning on timing figure. 12. Updated the sleep application in Chapter 3.5.1 and airplane mode in Chapter 3.5.2. 13. Updated I2C pins definition. 14. Updated current consumption.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 3 / 84 Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................... 6 Figure Index ................................................................................................................................................. 7 1 Introduction .......................................................................................................................................... 9 1.1. Safety Information.................................................................................................................... 10 2 Product Concept ................................................................................................................................ 11 2.1. General Description ................................................................................................................. 11 2.2. Directives and Standards ......................................................................................................... 11 2.2.1. FCC Statement ............................................................................................................... 12 2.2.2. FCC Radiation Exposure Statement .............................................................................. 12 2.3. Key Features ........................................................................................................................... 12 2.4. Functional Diagram ................................................................................................................. 15 2.5. Evaluation Board ..................................................................................................................... 16 3 Application Interface ......................................................................................................................... 17 3.1. General Description ................................................................................................................. 17 3.2. Pin Assignment ........................................................................................................................ 18 3.3. Pin Description ......................................................................................................................... 19 3.4. Operating Modes ..................................................................................................................... 25 3.5. Power Saving ........................................................................................................................... 25 3.5.1. Sleep Mode .................................................................................................................... 25 3.5.1.1. UART Application ................................................................................................. 26 3.5.1.2. USB Application with Suspend Function ............................................................. 26 3.5.1.3. USB Application without Suspend Function ........................................................ 27 3.5.2. Airplane Mode ................................................................................................................ 28 3.6. Power Supply ........................................................................................................................... 29 3.6.1. Power Supply Pins ......................................................................................................... 29 3.6.2. Decrease Voltage Drop .................................................................................................. 29 3.6.3. Reference Design for Power Supply .............................................................................. 30 3.6.4. Monitor the Power Supply .............................................................................................. 31 3.7. Turn on and off Scenarios ....................................................................................................... 31 3.7.1. Turn on Module Using the PWRKEY ............................................................................. 31 3.7.2. Turn off Module .............................................................................................................. 33 3.7.2.1. Turn off Module Using the PWRKEY Pin ............................................................. 33 3.7.2.2. Turn off Module Using AT Command ................................................................... 34 3.7.2.3. Automatic Shutdown ............................................................................................ 34 3.8. Reset the Module..................................................................................................................... 35 3.9. RTC Backup............................................................................................................................. 37

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 4 / 84 3.10. UART Interface ........................................................................................................................ 38 3.11. USIM Card Interface ................................................................................................................ 42 3.11.1. USIM Card Application ................................................................................................... 42 3.11.2. Design Considerations for USIM Connector .................................................................. 44 3.12. USB Interface .......................................................................................................................... 46 3.13. PCM and I2C Interface ............................................................................................................ 47 3.14. ADC Function .......................................................................................................................... 50 3.15. Network Status Indication ........................................................................................................ 51 3.16. Operating Status Indication ..................................................................................................... 52 3.16.1. STATUS .......................................................................................................................... 52 3.16.2. SLEEP_IND.................................................................................................................... 53 3.17. Behavior of the RI .................................................................................................................... 54 4 GNSS Receiver ................................................................................................................................... 55 4.1. General Description ................................................................................................................. 55 4.2. GNSS Performance ................................................................................................................. 56 4.3. Layout Guideline ...................................................................................................................... 57 5 Antenna Interface ............................................................................................................................... 58 5.1. UMTS Antenna Interface ......................................................................................................... 58 5.1.1. Pin Definition .................................................................................................................. 58 5.1.2. Operating Frequency ..................................................................................................... 58 5.1.3. Reference Design .......................................................................................................... 58 5.2. GNSS Antenna Interface ......................................................................................................... 59 5.2.1. Reference Design for Passive Antenna ......................................................................... 60 5.2.2. Reference Design for Active Antenna ............................................................................ 61 5.3. Antenna Installation ................................................................................................................. 61 5.3.1. Antenna Requirement .................................................................................................... 61 5.3.2. Install the Antenna with RF Connector .......................................................................... 62 6 Electrical, Reliability and Radio Characteristics ............................................................................ 64 6.1. Absolute Maximum Ratings ..................................................................................................... 64 6.2. Power Supply Ratings ............................................................................................................. 65 6.3. Operating Temperature ............................................................................................................ 65 6.4. Current Consumption .............................................................................................................. 65 6.5. RF Output Power ..................................................................................................................... 67 6.6. RF Receiving Sensitivity .......................................................................................................... 67 6.7. Electrostatic Discharge ............................................................................................................ 67 7 Mechanical Dimensions .................................................................................................................... 69 7.1. Mechanical Dimensions of the Module.................................................................................... 69 7.2. Footprint of Recommendation ................................................................................................. 72 7.3. Top View of the Module ........................................................................................................... 73 7.4. Bottom View of the Module ...................................................................................................... 73 8 Storage and Manufacturing .............................................................................................................. 74 8.1. Storage..................................................................................................................................... 74

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 5 / 84 8.2. Manufacturing and Welding ..................................................................................................... 74 8.3. Packaging ................................................................................................................................ 75 9 Appendix A Reference ....................................................................................................................... 77

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 6 / 84 Table Index TABLE 1: UC20 SERIES FREQUENCY BANDS ............................................................................................... 11 TABLE 2: UC20 KEY FEATURES ..................................................................................................................... 13 TABLE 3: IO PARAMETERS DEFINITION ........................................................................................................ 19 TABLE 4: PIN DESCRIPTION ........................................................................................................................... 19 TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 25 TABLE 6: VBAT AND GND PINS ....................................................................................................................... 29 TABLE 7: PWRKEY PIN DESCRIPTION .......................................................................................................... 31 TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 35 TABLE 9: PIN DEFINITION OF THE MAIN UART INTERFACE ....................................................................... 38 TABLE 10: PIN DEFINITION OF THE DEBUG UART INTERFACE ................................................................. 39 TABLE 11: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 39 TABLE 12: PIN DEFINITION OF THE USIM INTERFACE ............................................................................... 42 TABLE 13: PIN DESCRIPTION OF MOLEX USIM CONNECTOR ................................................................... 44 TABLE 14: PIN DESCRIPTION OF AMPHENOL USIM CONNECTOR ........................................................... 45 TABLE 15: USB PIN DESCRIPTION ................................................................................................................ 46 TABLE 16: PIN DEFINITION OF PCM AND I2C INTERFACE .......................................................................... 49 TABLE 17: PIN DEFINITION OF THE ADC ...................................................................................................... 50 TABLE 18: CHARACTERISTIC OF THE ADC .................................................................................................. 51 TABLE 19: PIN DEFINITION OF NETWORK INDICATOR ............................................................................... 51 TABLE 20: WORKING STATE OF THE NETWORK INDICATOR..................................................................... 51 TABLE 21: PIN DEFINITION OF STATUS ........................................................................................................ 52 TABLE 22: PIN DEFINITION OF SLEEP_IND .................................................................................................. 53 TABLE 23: BEHAVIOR OF THE RI ................................................................................................................... 54 TABLE 24: GNSS PERFORMANCE ................................................................................................................. 56 TABLE 25: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 58 TABLE 26: THE MODULE OPERATING FREQUENCIES ................................................................................ 58 TABLE 27: PIN DEFINITION OF GNSS ANTENNA .......................................................................................... 59 TABLE 28: GNSS FREQUENCY ....................................................................................................................... 60 TABLE 29: ANTENNA REQUIREMENTS .......................................................................................................... 62 TABLE 30: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 64 TABLE 31: THE MODULE POWER SUPPLY RATINGS .................................................................................. 65 TABLE 32: OPERATING TEMPERATURE ........................................................................................................ 65 TABLE 33: THE MODULE CURRENT CONSUMPTION .................................................................................. 66 TABLE 34: CONDUCTED RF OUTPUT POWER ............................................................................................. 67 TABLE 35: CONDUCTED RF RECEIVING SENSITIVITY ................................................................................ 67 TABLE 36: ELECTROSTATICS DISCHARGE CHARACTERISTICS ............................................................... 68 TABLE 37: RELATED DOCUMENTS ................................................................................................................ 77 TABLE 38: TERMS AND ABBREVIATIONS ...................................................................................................... 77

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 7 / 84 Figure Index FIGURE 1: FUNCTIONAL DIAGRAM ........................................................................................................ 16 FIGURE 2: PIN ASSIGNMENT (TOP VIEW)............................................................................................. 18 FIGURE 3: UART SLEEP APPLICATION .................................................................................................. 26 FIGURE 4: USB APPLICATION WITH SUSPEND FUNCTION ................................................................ 27 FIGURE 5: USB SLEEP APPLICATION WITHOUT SUSPEND FUNCTION ............................................ 28 FIGURE 6: STAR STRUCTURE OF THE POWER SUPPLY .................................................................... 30 FIGURE 7: REFERENCE CIRCUIT OF POWER SUPPLY ....................................................................... 30 FIGURE 8: TURN ON THE MODULE USING DRIVING CIRCUIT ........................................................... 31 FIGURE 9: TURN ON THE MODULE USING KEYSTROKE .................................................................... 32 FIGURE 10: TIMING OF TURNING ON MODULE ................................................................................... 33 FIGURE 11: TIMING OF TURNING OFF MODULE .................................................................................. 34 FIGURE 12: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT .............................. 36 FIGURE 13: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON .............................................. 36 FIGURE 14: TIMING OF RESETTING MODULE ...................................................................................... 36 FIGURE 15: RTC SUPPLY FROM NON-CHARGEABLE BATTERY ........................................................ 37 FIGURE 16: RTC SUPPLY FROM RECHARGEABLE BATTERY ............................................................ 37 FIGURE 17: RTC SUPPLY FROM CAPACITOR ....................................................................................... 38 FIGURE 18: REFERENCE CIRCUIT WITH TRANSLATOR CHIP............................................................ 40 FIGURE 19: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT ...................................................... 40 FIGURE 20: RS232 LEVEL MATCH CIRCUIT .......................................................................................... 41 FIGURE 21: REFERENCE CIRCUIT OF DEBUG UART WITH LEVEL TRANSLATOR .......................... 41 FIGURE 22: REFERENCE CIRCUIT OF THE 8 PIN USIM CARD ........................................................... 42 FIGURE 23: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ........................................................... 43 FIGURE 24: MOLEX 91228 USIM CONNECTOR .................................................................................... 44 FIGURE 25: AMPHENOL C707 10M006 512 2 USIM CARD CONNECTOR ........................................... 45 FIGURE 26: REFERENCE CIRCUIT OF USB APPLICATION ................................................................. 46 FIGURE 27: TEST POINTS OF FIRMWARE UPGRADE ......................................................................... 47 FIGURE 28: PRIMARY MODE TIMING ..................................................................................................... 48 FIGURE 29: AUXILIARY MODE TIMING ................................................................................................... 49 FIGURE 30: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC ............................ 50 FIGURE 31: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .................................................. 52 FIGURE 32: REFERENCE CIRCUIT OF THE STATUS............................................................................ 53 FIGURE 33: REFERENCE CIRCUIT OF THE SLEEP_IND ..................................................................... 54 FIGURE 34: REFERENCE CIRCUIT OF ANTENNA INTERFACE ........................................................... 59 FIGURE 35: REFERENCE CIRCUIT OF GNSS PASSIVE ANTENNA ..................................................... 60 FIGURE 36: REFERENCE CIRCUIT OF GNSS ACTIVE ANTENNA ....................................................... 61 FIGURE 37: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ........................................ 62 FIGURE 38: MECHANICALS OF UF.L-LP CONNECTORS ..................................................................... 63 FIGURE 39: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ................................................... 63 FIGURE 40: UC20 TOP AND SIDE DIMENSIONS ................................................................................... 69 FIGURE 41: UC20 BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................ 70

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 8 / 84 FIGURE 42: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ............................................................... 71 FIGURE 43: RECOMMENDED FOOTPRINT (TOP VIEW) ...................................................................... 72 FIGURE 44: TOP VIEW OF THE MODULE .............................................................................................. 73 FIGURE 45: BOTTOM VIEW OF THE MODULE ...................................................................................... 73 FIGURE 46: LIQUIDS TEMPERATURE .................................................................................................... 75 FIGURE 47: CARRIER TAPE .................................................................................................................... 76

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 9 / 84 1 Introduction This document defines the UC20 module and describes its hardware interface which are connected with your application and the air interface. This document can help you quickly understand module interface specifications, electrical and mechanical details. Associated with application notes and user guide, you can use UC20 module to design and set up mobile applications easily.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 10 / 84 1.1. Safety Information The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating UC20 module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel and to incorporate these guidelines into all manuals supplied with the product. If not so, Quectel does not take on any liability for customer failure to comply with these precautions. Full attention must be given to driving at all times in order to reduce the risk of an accident. Using a mobile while driving (even with a handsfree kit) cause distraction and can lead to an accident. You must comply with laws and regulations restricting the use of wireless devices while driving. Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it switched off. The operation of wireless appliances in an aircraft is forbidden to prevent interference with communication systems. Consult the airline staff about the use of wireless devices on boarding the aircraft, if your device offers a Airplane Mode which must be enabled prior to boarding an aircraft. Switch off your wireless device when in hospitals or clinics or other health care facilities. These requests are desinged to prevent possible interference with sentitive medical equipment. GSM cellular terminals or mobiles operate over radio frequency signal and cellular network and cannot be guaranteed to connect in all conditions, for example no mobile fee or an invalid SIM card. While you are in this condition and need emergent help, please remember using emergency call. In order to make or receive call, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength. Your cellular terminal or mobile contains a transmitter and receiver. When it is ON , it receives and transmits radio frequency energy. RF interference can occur if it is used close to TV set, radio, computer or other electric equipment. In locations with potencially explosive atmospheres, obey all posted signs to turn off wireless devices such as your phone or other cellular terminals. Areas with potencially exposive atmospheres including fuelling areas, below decks on boats, fuel or chemical transfer or storage facilities, areas where the air contains chemicals or particles such as grain, dust or metal powders.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 12 / 84 2.2.1. FCC Statement 1. This device complies with Part 15 of the FCC rules. Operation is subject to the following conditions: a) This device may not cause harmful interference. b) This device must accept any interference received, including interference that may cause undesired operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. 2.2.2. FCC Radiation Exposure Statement This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body as well as kept minimum 20cm from radio antenna depending on the Mobile status of this module usage. This module should NOT be installed and operating simultaneously with other radio. The manual of the host system, which uses UC20, must include RF exposure warning statement to advice user should keep minimum 20cm from the radio antenna of UC20 module depending on the Mobile status. Note: If a portable device (such as PDA) uses UC20 module, the device needs to do permissive change and SAR testing. The following list of antenna is indicating the maximum permissible antenna gain. Part Number Frequency Range (MHz) Peak Gain (XZ-V) Average Gain (XZ-V) VSWR Impedance 3R007A UMTS1900:1850~1990 UMTS850:824-894 1 dBi typ. 1 dBi typ. 3 max 50Ω 2.3. Key Features The following table describes the detailed features of UC20 module.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 13 / 84 Table 2: UC20 Key Features Feature Details Power Supply Supply voltage: 3.4V~4.3V Typical supply voltage: 3.8V Frequency Bands UC20-A: UMTS850/1900 Transmission Data HSPA R6: Max 14.4Mbps (DL)/Max 5.76Mbps (UL) UMTS R99: Max 384kbps (DL)/Max 384kbps (UL) CSD: 14.4kbps Transmitting Power Class 3 (22.5dBm+1/-1dB) for UMTS 850/1900/ HSPA and UMTS Features HSPA data rate is corresponded with 3GPP R6. 14.4Mbps on downlink and 5.76Mbps on uplink. WCDMA data rate is corresponded with 3GPP R99/R4. 384kbps on downlink and 384kbps on uplink. Support both 16-QAM and QPSK modulation. Internet Protocol Features Support TCP/PPP/UDP protocols Support the protocols PAP (Password Authentication Protocol) and CHAP (Challenge Handshake Authentication Protocol) usually used for PPP connections. SMS Text and PDU mode Point to point MO and MT SMS cell broadcast SMS storage: ME by default USIM Interface Support USIM/SIM card: 1.8V, 3.0V Audio Features Support one digital audio interface: PCM interface WCDMA: AMR/AMR-WB Echo cancellation and noise suppression PCM Interface Used for audio function with external codec. Support 8-bit A-law, μ-law and 16-bit linear data formats. Support long frame sync and short frame sync. Support master and slave mode, but must be the master in long frame sync. UART Interface Support two UART interfaces: main UART interface and debug UART interface

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 14 / 84 “1)” means when the module works within this temperature range, RF performance might degrade. For example, the frequency error or the phase error would increase. Main UART interface:  Seven lines on main UART interface  Support RTS and CTS hardware flow control  Baud rate can reach up to 921600bps, 115200bps by default  Used for AT command, data transmission or firmware upgrade  Multiplexing function Debug UART interface:  Two lines on debug UART interface: DBG_TXD and DBG_RXD  Can be used for GNSS NMEA sentences output USB Interface Compliant with USB 2.0 specification (slave only), the data transfer rate can reach up to 480Mbps. Used for AT command communication, data transmission, GNSS NMEA output, software debug and firmware upgrade. USB Driver: Windows XP, Windows Vista, Windows 7, Windows 8, Windows CE5.0/6.0, Linux 2.6/3.0, Android 2.3/4.0. Rx-diversity Support UMTS Rx-diversity GNSS Features Gen8 of Qualcomm GNSS engine (GPS and GLONASS) Protocol: NMEA 0183 AT Commands Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT commands. Real Time Clock Implemented Network Indication Two pins including NET_MODE and NET_STATUS to indicate network connectivity status. Antenna Interface Include main UMTS antenna, UMTS diversity antenna, GNSS antenna (passive). Physical Characteristics Size: 32.0±0.15 × 29.0±0.15 × 2.5±0.2mm Weight: approx. 4.9g Temperature Range Normal operation: -35°C ~ +75°C Restricted operation: -40°C ~ -35°C and +75°C ~ +85°C 1) Storage temperature: -45°C ~ +90°C Firmware Upgrade USB interface (by default) or main UART interface. RoHS All hardware components are fully compliant with EU RoHS directive. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 15 / 84 2.4. Functional Diagram The following figure shows a block diagram of UC20 and illustrates the major functional parts.  Power management  Baseband  DDR+NAND flash  Radio frequency  Peripheral interface --UART interface --USIM card interface --USB interface --PCM interface --ADC interface --Status indication --Control interface

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 16 / 84 PWRKEYRESET_N 32kHz 19.2MHzPower Management Unit BasebandRF TransceiverGNSS ReceiverANT_GNSSRF SwitchDDR RAM/ANT_MAINUSIMSTATUSADCPCMUARTVBAT_BBUSBANT_DIVVBAT_RFVDD_EXTGSM UMTSRF SwitchVDD_2V85WAKEUP_INVRTCSLEEP_INDW_DISABLE#NAND Flash Figure 1: Functional Diagram 2.5. Evaluation Board In order to help you to develop applications with UC20, Quectel supplies an evaluation board (EVB), RS-232 to USB cable, USB data cable, power adapter, earphone, antenna and other peripherals to control or test the module. For details, please refer to document [2].

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 17 / 84 3 Application Interface 3.1. General Description UC20 is equipped with a 72-pin 1.3mm pitch SMT pads plus 40-pin ground pads and reserved pads that connect to cellular application platform. Sub-interfaces included in these pads are described in detail in the following chapters:  Power supply  UART interface  USIM interface  USB interface  PCM interface  ADC interface  Status indication

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 18 / 84 3.2. Pin Assignment The following figure shows the pin assignment of the UC20 module. 35362021222324252627282930313233341345672WAKEUP_INAP_READYSLEEP_INDW_DISABLE#NET_MODENET_STATUSVDD_EXTGNDGNDDBG_RXDDBG_TXDUSIM_PRESENCEUSIM_VDDUSIM_DATAUSIM_CLKUSIM_RSTVRTC8910111213141516171819545352515049484746454443424140393837727170696867666564636261605958575655USIM_GNDGNDRESET_NPWRKEYAGNDRESERVEDPCM_INPCM_OUTPCM_SYNCPCM_CLKRESERVEDRESERVEDRESERVEDRESERVEDRESERVEDRESERVEDVDD_2V85ANT_DIVGNDGNDUSB_VBUSUSB_DMUSB_DPRXDTXDDTRRTSCTSDCDRISTATUSVBAT_BBVBAT_BBVBAT_RFVBAT_RFGNDRESERVEDGNDGNDANT_MAINGNDANT_GNSSGNDADC1RESERVEDI2C_SDAI2C_SCLRESERVEDRESERVEDRESERVEDRESERVEDADC0GNDGNDGND737475767778798081828384100101102106107111112103104109105110899498889397869196859095998792Power USB UART USIM PCM ANT GND RESERVED OTHERS108 Figure 2: Pin Assignment (Top View) 1. Keep all reserved pins and unused pins unconnected. 2. GND pads 85~112 should be connected to ground in the design, and RESERVED pads 73~84 should be unconnected. NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 19 / 84 3.3. Pin Description The following tables show the UC20’s pin definition. Table 3: IO Parameters Definition Type Description IO Bidirectional input/output DI Digital input DO Digital output PI Power input PO Power output AI Analog input AO Analog output OD Open drain Table 4: Pin Description Power Supply Pin Name Pin No. I/O Description DC Characteristics Comment VBAT_BB 59,60 PI Power supply for module baseband part. Vmax = 4.3V Vmin = 3.4V Vnorm = 3.8V It must be able to provide sufficient current up to 0.8A. VBAT_RF 57,58 PI Power supply for module RF part. Vmax = 4.3V Vmin = 3.4V Vnorm = 3.8V It must be able to provide sufficient current in a transmitting burst which typically rises to 2.0A. VRTC 18 IO Power supply for internal RTC circuit. VOmax = 3.25V when VBAT ≥ 3.4V. VI = 1.5V~3.25V at IIN = 3uA when VBAT is not applied.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 20 / 84 VDD_EXT 7 PO Provide 1.8V for external circuit. Vnorm = 1.8V IOmax = 20mA Power supply for external GPIO’s pull up circuits. VDD_2V85 34 PO Provide 2.85V for external circuit. Vnorm = 2.85V IOmax = 100mA Power supply for external GNSS LNA, active antenna and other circuits. GND 8,9,19,36, 46,48,50~ 54,56,72, 85~112 Ground. Turn On/Off Pin Name Pin No. I/O Description DC Characteristics Comment PWRKEY 21 DI Turn on/off the module. RPU ≈ 200kΩ VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally. RESET_N 20 DI Reset the module. RPU ≈ 200kΩ VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally. Active low. Status Indication Pin Name Pin No. I/O Description DC Characteristics Comment STATUS 61 OD Indicate the module operating status. Require external pull-up. NET_MODE 5 DO Indicate the module network registration mode. VOHmin = 1.35V VOLmax = 0.45V 1.8V power domain. NET_ STATUS 6 DO Indicate the module network activity status. VOHmin = 1.35V VOLmax = 0.45V 1.8V power domain. SLEEP_IND 3 DO Indicate the sleep status. VOHmin = 1.35V VOLmax = 0.45V 1.8V power domain. USB Interface Pin Name Pin No. I/O Description DC Characteristics Comment

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 21 / 84 USB_VBUS 71 PI USB detection. Vmax = 5.25V Vmin = 3.0V Vnorm = 5.0V USB_DP 69 IO USB differential data bus. Compliant with USB 2.0 standard specification. Require differential impedance of 90Ω. USB_DM 70 IO USB differential data bus. Compliant with USB 2.0 standard specification. Require differential impedance of 90Ω. USIM Interface Pin Name Pin No. I/O Description DC Characteristics Comment USIM_GND 10 Specified ground for USIM card. USIM_VDD 14 PO Power supply for USIM card. For 1.8V USIM: Vmax = 1.98V Vmin = 1.62V For 3.0V USIM: Vmax = 3.3V Vmin = 2.7V IOmax = 50mA Either 1.8V or 3V is supported by the module automatically. USIM_DATA 15 IO Data signal of USIM card. For 1.8V USIM: VILmax = 0.27V VIHmin = 1.26V VIHmax = 1.8V VOLmax = 0.27V VOHmin = 1.26V For 3.0V USIM: VILmax = 0.45V VIHmin = 2.1V VIHmax = 3.0V VOLmax = 0.45V VOHmin = 2.1V Pull-up to USIM_VDD with 15k resistor internally. USIM_CLK 16 DO Clock signal of USIM card. For 1.8V USIM: VOLmax = 0.36V VOHmin = 1.26V For 3.0V USIM: VOLmax = 0.5V VOHmin = 2.1V

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 22 / 84 USIM_RST 17 DO Reset signal of USIM card. For 1.8V USIM: VOLmax = 0.22V VOHmin = 1.44V For 3.0V USIM: VOLmax = 0.36V VOHmin = 2.4V USIM_PRESENCE 13 DI USIM card insertion detection. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. ADC Interface Pin Name Pin No. I/O Description DC Characteristics Comment ADC0 45 AI General purpose analog to digital converter. Voltage range: 0.2V to 2.1V ADC1 44 AI General purpose analog to digital converter. Voltage range: 0.2V to 4.2V Main UART Interface Pin Name Pin No. I/O Description DC Characteristics Comment RI 62 DO Ring indicator. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. DCD 63 DO Data carrier detection. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. CTS 64 DO Clear to send. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. RTS 65 DI Request to send. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. DTR 66 DI Data terminal ready. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. Pull-up by default. TXD 67 DO Transmit data. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 23 / 84 RXD 68 DI Receive data. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. Debug UART Interface Pin Name Pin No. I/O Description DC Characteristics Comment DBG_TXD 12 DO Transmit data. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. DBG_RXD 11 DI Receive data. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. RF Interface Pin Name Pin No. I/O Description DC Characteristics Comment ANT_DIV 35 AI Diversity antenna. 50Ω impedance ANT_MAIN 49 IO Main antenna. 50Ω impedance ANT_GNSS 47 AI GNNS antenna. 50Ω impedance PCM Interface Pin Name Pin No. I/O Description DC Characteristics Comment PCM_IN 24 DI PCM data input. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. PCM_OUT 25 DO PCM data output. VOLmax = 0.45V VOHmin = 1.35V 1.8V power domain. PCM_SYNC 26 IO PCM data frame sync signal. VOLmax = 0.45V VOHmin = 1.35V VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. In master mode, it is an output signal. In slave mode, it is an input signal. PCM_CLK 27 IO PCM data bit clock. VOLmax = 0.45V VOHmin = 1.35V VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. In master mode, it’s an output signal. In slave mode, it is an input signal.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 24 / 84 AGND 22 Reserved for analog ground. Ground. If unused, connect this pin to ground. I2C Interface Pin Name Pin No. I/O Description DC Characteristics Comment I2C_SCL 41 OD I2C serial clock. External pull-up resistor is required. 1.8V only. I2C_SDA 42 OD I2C serial data. External pull-up resistor is required. 1.8V only. Other Pins Pin Name Pin No. I/O Description DC Characteristics Comment WAKEUP_ IN 1 DI Sleep mode control. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. Pull-up by default. Low level wakes up the module. W_DISABLE# 4 DI Airplane mode control. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. Pull-up by default. In low level voltage, module can enter into airplane mode. AP_READY 2 DI Application processor sleep state detection. VILmin = -0.3V VILmax = 0.6V VIHmin = 1.2V VIHmax = 2.0V 1.8V power domain. RESERVED Pins Pin Name Pin No. I/O Description DC Characteristics Comment RESERV ED 23,28~33,37~40,43,55,73~84 Reserved Keep these pins unconnected.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 25 / 84 3.4. Operating Modes The table below briefly summarizes the various operating modes referred to in the following chapters. Table 5: Overview of Operating Modes Mode Details Normal Operation UMTS Idle Software is active. The module has registered to the UMTS network and the module is ready to send and receive data. UMTS Talk/Data UMTS connection is ongoing. In this mode, the power consumption is decided by network setting (e.g. TPC pattern) and data transfer rate. HSPA Idle Software is active. The module has registered to the HSPA network and the module is ready to send and receive data. HSPA Data HSPA data transfer is ongoing. In this mode, the power consumption is decided by network setting (e.g. TPC pattern) and data transfer rate. Minimum Functionality Mode AT+CFUN command can set the module entering into a minimum functionality mode without removing the power supply. In this case, both RF function and USIM card will be invalid. Airplane Mode AT+CFUN command and W_DISABLE# pin can set the module entering into airplane mode. In this case, RF function will be invalid. Sleep Mode In this mode, the current consumption of the module will be reduced to the minimal level. During this mode, the module can still receive paging message, SMS and voice call from the network normally. Power Down Mode In this mode, the power management unit shuts down the power supply. Only the power supply for RTC remains. Software is not active. The serial interface is not accessible. Operating voltage (connected to VBAT_RF and VBAT_BB) remains applied. 3.5. Power Saving 3.5.1. Sleep Mode UC20 is able to reduce its current consumption to a minimum value during the sleep mode. The following section describes UC20’s power saving procedure.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 26 / 84 3.5.1.1. UART Application If application processor communicates with module via UART interface, the following preconditions can let the module enter into the sleep mode.  Execute AT command AT+QSCLK=1 to enable the sleep mode.  Drive DTR to high level. The following figure shows the connection between the module and application processor. RXDTXDRIDTRAP_READYTXDRXDEINTGPIOGPIOModule ProcessorGND GND Figure 3: UART Sleep Application The RI of module is used to wake up the processor, and AP_READY will detect the sleep state of processor (can be configured to high level or low level detection). You should pay attention to the level match shown in dotted line between module and processor. Drive DTR to low level will wake up the module. 3.5.1.2. USB Application with Suspend Function If application processor communicates with module via USB interface, and processor supports USB suspend function, the following preconditions can let the module enter into the sleep mode.  Execute AT command AT+QSCLK=1 to enable the sleep mode.  The processor’s USB bus which is connected with the module USB interface enters into suspended state. The following figure shows the connection between the module and processor.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 27 / 84 USB_VBUSUSB_DPUSB_DMAP_READYVDDUSB_DPUSB_DMGPIOModule ProcessorGND GNDRI EINT Figure 4: USB Application with Suspend Function When the processor’s USB bus returns to resume state, the module will be woken up. 3.5.1.3. USB Application without Suspend Function If application processor communicates with module via USB interface, and processor does not support USB suspend function, you should disconnect USB_VBUS with additional control circuit to let the module enter into sleep mode.  Execute AT command AT+QSCLK=1 to enable the sleep mode.  Disconnect USB_VBUS. The following figure shows the connection between the module and application processor.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 28 / 84 USB_VBUSUSB_DPUSB_DMAP_READYVDDUSB_DPUSB_DMGPIOModule ProcessorRI EINTPower SwitchGPIOGND GND Figure 5: USB Sleep Application without Suspend Function Supply power to USB_VBUS will wake up the module. In sleep mode, module can still receive paging, voice call and SMS from network, but the UART port is not accessible. When the module enters into the sleep mode, the SLEEP_IND will output a high logic level. 3.5.2. Airplane Mode When module gets into the airplane mode, the RF function does not work, and all AT commands correlative with RF function will be not accessible. This mode can be set with the following way. Hardware: The W_DISABLE# pin is pulled up by default, drive it to low level will let the module get into airplane mode. Software: Command AT+CFUN provides the choice of the functionality level <fun>=0, 1, 4. AT+CFUN=0: Minimum functionality mode, both USIM and RF function are disabled. AT+CFUN=1: Full functionality mode (by default). AT+CFUN=4: Airplane mode. RF function is disabled. 1. The W_DISABLE# control function is disabled in firmware by default. It can be enabled by AT command AT+QCFG=“airplanecontrol”. Refer to document [1]. 2. When the module is in sleep mode, the W_DISABLE# control is invalid. Please be sure to wake the NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 29 / 84 module up first. 3. GNSS function is still available when RF function is disabled. 3.6. Power Supply 3.6.1. Power Supply Pins UC20 provides four VBAT pins dedicated to connect with the external power supply. There are two separate voltage domains for VBAT.  VBAT_RF with two pads for module RF part.  VBAT_BB with two pads for module baseband part. The following table shows the VBAT pins and ground pins. Table 6: VBAT and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VBAT_RF 57,58 Power supply for module RF part. 3.4 3.8 4.3 V VBAT_BB 59,60 Power supply for module baseband part. 3.4 3.8 4.3 V GND 8,9,19,36,46, 48,50~54,56, 72, 85~112 Ground. - 0 - V 3.6.2. Decrease Voltage Drop The power supply range of the module is 3.4V ~ 4.3V. Because of the voltage drop during the transmitting time, a bypass capacitor of about 100µF with low ESR should be used. Multi-layer ceramic chip (MLCC) capacitor can provide the best combination of low ESR. Three ceramic capacitors (100nF, 33pF, 10pF) are recommended to be applied to the VBAT pins. The capacitors should be placed close to the UC20’s VBAT pins. The following figure shows star structure of the power supply. The main power supply from an external application has to be a single voltage source and has to be expanded to two sub paths with star structure. In addition, in order to get a stable power source, it is suggested to use a zener diode of which reverse zener voltage is 5.1V and dissipation power is more than 0.5W.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 30 / 84 ModuleVBAT_RFVBAT_BBVBATC1100uFC6100nFC733pFC810pF++C2100nFC5100uFC333pFC410pFFB1FB2D15.1V Figure 6: Star Structure of the Power Supply Please pay special attention to the power supply design for applications. Make sure the input voltage will never drop below 3.4V. If the voltage drops below 3.4V, the module will turn off automatically. The PCB traces from the VBAT pins to the power source must be wide enough to ensure that there isn’t too much voltage drop occurs in the transmitting procedure. The width of VBAT_BB trace should be no less than 1mm, and the width of VBAT_RF trace should be no less than 2mm, and the principle of the VBAT trace is the longer, the wider. 3.6.3. Reference Design for Power Supply The power design for the module is very important, since the performance of power supply for the module largely depends on the power source. The power supply is capable of providing the sufficient current up to 2A at least. If the voltage drop between the input and output is not too high, it is suggested to use a LDO to supply power for module. If there is a big voltage difference between the input source and the desired output (VBAT), a buck converter is preferred to be used as a power supply. The following figure shows a reference design for +5V input power source. The designed output for the power supply is 3.88V and the maximum load current is 3A. DC_INC1 C2MIC29302WU U1IN OUTENGNDADJ2 4135VBAT 100nFC3470uFC4100nFR2100K47KR3470uF470R51KR4R11%1% Figure 7: Reference Circuit of Power Supply

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 31 / 84 3.6.4. Monitor the Power Supply You can use the AT+CBC command to monitor the VBAT_BB voltage value. For more details, please refer to document [1]. 3.7. Turn on and off Scenarios 3.7.1. Turn on Module Using the PWRKEY The following table shows the pin definition of PWRKEY. Table 7: PWRKEY Pin Description Pin Name Pin No. Description DC Characteristics Comment PWRKEY 21 Turn on/off the module. VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally with 200kΩ resistor. When UC20 is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin to a low level at least 100ms. It is recommended to use an open drain/collector driver to control the PWRKEY. You can monitor the level of the STATUS pin to judge whether the module is turned on or not. After STATUS pin (require external pull-up) outputting a low level, PWRKEY pin can be released. A simple reference circuit is illustrated in the following figure. Turn on pulsePWRKEY4.7K47K≥ 100ms Figure 8: Turn on the Module Using Driving Circuit The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be placed nearby the button for ESD protection. When pressing the key, electrostatic strike may generate from finger. A reference circuit is showed in the following figure.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 32 / 84 PWRKEYS1Close to S1TVS Figure 9: Turn on the Module Using Keystroke The turn on scenarios is illustrated as the following figure.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 33 / 84 VIL ≤ 0.5VVIH ≥ 1.3VVBATPWRKEY≥ 100ms1RESET_NSTATUS(OD)1.3 ~ 1.9sInactiveUART Active≥ 5sInactive ActiveUSB≥ 5s Figure 10: Timing of Turning on Module Make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is recommended 30ms. 3.7.2. Turn off Module The following procedures can be used to turn off the module:  Normal power down procedure: Turn off the module using the PWRKEY pin.  Normal power down procedure: Turn off the module using command AT+QPOWD.  Automatic shutdown: Turn off the module automatically if under-voltage or over-voltage is detected. 3.7.2.1. Turn off Module Using the PWRKEY Pin Driving the PWRKEY to a low level voltage at least 0.6s, the module will execute power-down procedure after PWRKEY is released. The power-down scenario is illustrated as the following figure. NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 34 / 84 VBATPWRKEYLog off network about 1s to 60s≥ 0.6sRUNNING Power-down procedure OFFModuleStatusSTATUS(OD) Figure 11: Timing of Turning off Module During power-down procedure, module will send out URC “NORMAL POWER DOWN” via URC port first, then log off network and save important data. After logging off, module sends out “POWERED DOWN” and shut down the internal power supply. The power on VBAT pins is not allowed to turn off before the URC “POWERED DOWN” is output to avoid data loss. If logging off is not done within 60s, module will shut down internal power supply forcibly. After that moment, the module enters the power down mode, no other AT commands can be executed and only the RTC is still active. The power down mode can also be indicated by the STATUS pin. 3.7.2.2. Turn off Module Using AT Command It is also a safe way to use AT command AT+QPOWD to turn off the module, which is similar to turning off the module via PWRKEY Pin Please refer to document [1] for details about the AT command of AT+QPOWD. 3.7.2.3. Automatic Shutdown The module will constantly monitor the voltage applied on the VBAT, if the voltage ≤ 3.5V, the following URC will be presented: +QIND: “vbatt”,-1 If the voltage ≥ 4.21V, the following URC will be presented: +QIND: “vbatt”,1

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 35 / 84 The uncritical voltage is 3.4V to 4.3V, If the voltage > 4.3V or < 3.4V the module would automatically shut down itself. If the voltage < 3.4V, the following URC will be presented: +QIND: “vbatt”,-2 If the voltage > 4.3V, the following URC will be presented: +QIND: “vbatt”,2 The value of voltage threshold can be revised by command AT+QCFG=“vbatt”, refer to document [1] for details. 3.8. Reset the Module The RESET_N can be used to reset the module. Table 8: RESET_N Pin Description Pin Name Pin No. Description DC Characteristics Comment RESET_N 20 Reset the module. VIHmax = 2.1V VIHmin = 1.3V VILmax = 500mV Pull-up to 1.8V internally with 200kΩ resistor. Active low. You can reset the module by driving the RESET_N to a low level voltage for more than 150ms and then releasing. The recommended circuit is similar to the PWRKEY control circuit. You can use open drain/collector driver or button to control the RESET_N. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 36 / 84 Reset pulseRESET_N4.7K47K≥ 150ms Figure 12: Reference Circuit of RESET_N by Using Driving Circuit RESET_NS2Close to S2TVS Figure 13: Reference Circuit of RESET_N by Using Button The reset scenario is illustrated as the following figure. VIL ≤ 0.5VVIH ≥ 1.3VVBAT150msRESETTINGModule Status RUNNINGRESET_NRUNNING≥ 5s Figure 14: Timing of Resetting Module

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 37 / 84 Use the RESET_N only when turning off the module by the command AT+QPOWD and the PWRKEY pin failed. 3.9. RTC Backup The RTC (Real Time Clock) can be powered by an external power source through the pin VRTC when the module is powered down and there is no power supply for the VBAT. It is also available to charge the battery on the VRTC when module is turned on. You can choose rechargeable battery, capacitor or non-rechargeable battery depending on different applications. The following figures show the various sample circuits for VRTC backup. ModuleRTC CoreRVRTCNon-chargeable Battery Figure 15: RTC Supply from Non-chargeable Battery Rechargeable BatteryModuleRTC CoreRVRTC Figure 16: RTC Supply from Rechargeable Battery NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 38 / 84 Large Capacitance CapacitorModuleRTC CoreRVRTC Figure 17: RTC Supply from Capacitor 3.10. UART Interface The module provides two UART interfaces: main UART interface and debug UART interface. The following shows the different features.  Main UART interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600bps baud rate, the default is 115200bps, while autobauding is not supported. This interface can be used for data transmission, AT communication or firmware upgrade.  Debug UART interface supports 115200bps. It can be used for GNSS NMEA sentences output. USB interface supports software debug and firmware upgrade by default. The module is designed as the DCE (Data Communication Equipment), following the traditional DCE-DTE (Data Terminal Equipment) connection. The following tables show the pin definition of these two UART interfaces. Table 9: Pin Definition of the Main UART Interface Pin Name Pin No. I/O Description Comment RI 62 DO Ring indicator. 1.8V power domain. DCD 63 DO Data carrier detection. 1.8V power domain. CTS 64 DO Clear to send. 1.8V power domain. RTS 65 DI Request to send. 1.8V power domain. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 39 / 84 DTR 66 DI Data terminal ready. 1.8V power domain. TXD 67 DO Transmit data. 1.8V power domain. RXD 68 DI Receive data. 1.8V power domain. Table 10: Pin Definition of the Debug UART Interface Pin Name Pin No. I/O Description Comment DBG_TXD 12 DO Transmit data. 1.8V power domain. DBG_RXD 11 DI Receive data. 1.8V power domain. The logic levels are described in the following table. Table 11: Logic Levels of Digital I/O Parameter Min Max Unit VIL -0.3 0.6 V VIH 1.2 2.0 V VOL 0 0.45 V VOH 1.35 1.8 V UC20 provides 1.8V UART interface. A level translator should be used if your application is equipped with a 3.3V UART interface. A level translator TXB0108PWR provided by Texas Instruments is recommended. The following figure shows the reference design of the TXB0108PWR.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 40 / 84 VCCA VCCBOEA1A2A3A4A5A6A7A8GNDB1B2B3B4B5B6B7B8VDD_EXTRIDCDRTSRXDDTRCTSTXD51K 51K0.1uF 0.1uFRI_3.3VDCD_3.3VRTS_3.3VRXD_3.3VDTR_3.3VCTS_3.3VTXD_3.3VVDD_3.3VTXB0108PWR Figure 18: Reference Circuit with Translator Chip Please visit http://www.ti.com for more information. Another example with transistor translation circuit is shown as below. The construction of dotted line can refer to the construction of solid line. Please pay attention to direction of connection. Input dotted line of module should refer to input solid line of the module. Output dotted line of module should refer to output solid line of the module. MCU/ARM/TXD/RXDVDD_EXT4.7KVCC_MCU4.7K4.7K4.7KVDD_EXTTXDRXDRTSCTSDTRRI/RTS/CTSGNDGPIO DCDModuleGPIOEINTVCC_MCU4.7KGND Figure 19: Reference Circuit with Transistor Circuit The following figure is an example of connection between UC20 and PC. A voltage level translator and a RS-232 level translator chip must be inserted between module and PC, since these two UART interfaces do not support the RS-232 level, while support the 1.8V CMOS level only.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 41 / 84 TXB0108PWRDCD_3.3VRTS_3.3VDTR_3.3VRXD_3.3VRI_3.3VCTS_3.3VTXD_3.3VDCDRTSDTRRXDRICTSTXDDCD_1.8VRTS_1.8VDTR_1.8VRXD_1.8VRI_1.8VCTS_1.8VTXD_1.8VVCCAModuleGND GNDVDD_EXT VCCB3.3VDIN1ROUT3ROUT2ROUT1DIN4DIN3DIN2DIN5R1OUTBFORCEON/FORCEOFF /INVALID3.3VDOUT1DOUT2DOUT3DOUT4DOUT5RIN3RIN2RIN1VCC GNDOESN65C3238 DB-9Connect to PCDCDRTSDTRTXDRICTSRXDDSRGND123456789 Figure 20: RS232 Level Match Circuit The following figure shows the reference circuit of debug UART interface with logic level translator. TXB0102DCU provided by Texas Instruments is recommended. VCCA VCCBOEA1A2GNDB1B2VDD_EXTDBG_TXDDBG_RXD0.1uF 0.1uFDBG_TXD_3.3VDBG_RXD_3.3VVDD_3.3VTXB0102DCU Figure 21: Reference Circuit of Debug UART with Level Translator Please visit http://www.ti.com for more information. 1. The module disables the hardware flow control by default. When hardware flow control is required, RTS and CTS should be connected to the host. AT command AT+IFC=2,2 is used to enable hardware flow control. AT command AT+IFC=0,0 is used to disable the hardware flow control. For more details, please refer to document [1]. 2. Rising on DTR will let the module exit from the data mode by default. It can be disabled by AT commands. Refer to document [1] about the command AT&D and AT&V for details. 3. DCD is used as data mode indication. Refer to document [1] about the command AT&C and AT&V for details. NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 42 / 84 3.11. USIM Card Interface 3.11.1. USIM Card Application The USIM card interface circuitry meets ETSI and IMT-2000 SIM interface requirements. Both 1.8V and 3.0V USIM cards are supported. Table 12: Pin Definition of the USIM Interface Pin Name Pin No. I/O Description Comment USIM_VDD 14 PO Power supply for USIM card. Either 1.8V or 3.0V is supported by the module automatically. USIM_DATA 15 IO Data signal of USIM card. Pull-up to USIM_VDD with 15k resistor internally. USIM_CLK 16 DO Clock signal of USIM card. USIM_RST 17 DO Reset signal of USIM card. USIM_PRESENCE 13 DI USIM card insertion detection. 1.8V power domain. USIM_GND 10 Specified ground for USIM card. The following figure shows the reference design of the 8-pin USIM card. ModuleUSIM_VDDUSIM_GNDUSIM_RSTUSIM_CLKUSIM_DATAUSIM_PRESENCE22R22R22RVDD_EXT51K100nF USIM ConnectorGNDGNDESDA6V8AV633pF 33pF 33pFVCCRSTCLK IOVPPGNDGNDUSIM_VDD15K Figure 22: Reference Circuit of the 8 Pin USIM Card

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 43 / 84 Some AT commands are invalid when USIM card is not applied. UC20 supports USIM card hot-plugging via the USIM_PRESENCE pin. For details, refer to document [1] about the command AT+QSIMDET. If you do not need the USIM card detection function, keep USIM_PRESENCE unconnected. The reference circuit for using a 6-pin USIM card connector is illustrated as the following figure. ModuleUSIM_VDDUSIM_GNDUSIM_RSTUSIM_CLKUSIM_DATA 22R22R22R100nF USIM ConnectorGNDESDA6V8AV633pF 33pF 33pFVCCRSTCLK IOVPPGNDGND15KUSIM_VDD Figure 23: Reference Circuit of the 6 Pin USIM Card In order to enhance the reliability and availability of the USIM card in your application, please follow the following criterion in the USIM circuit design:  Keep layout of USIM card as close as possible to the module. Assure the length of the trace is less than 200mm.  Keep USIM card signal away from RF and VBAT alignment.  Assure the ground between module and USIM connector short and wide. Keep the width of ground and USIM_VDD no less than 0.5mm to maintain the same electric potential. The decouple capacitor of USIM_VDD should be less than 1uF and must be near to USIM connector.  To avoid cross-talk between USIM_DATA and USIM_CLK, keep them away with each other and shield them with surrounded ground.  In order to offer good ESD protection, it is recommended to add TVS such as WILL (http://www.willsemi.com) ESDA6V8AV6. The 22Ω resistors should be added in series between the module and the USIM card so as to suppress the EMI spurious transmission and enhance the ESD protection.  The pull-up resistor on USIM_DATA line can improve anti-jamming capability when long layout trace and sensitive occasion is applied. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 44 / 84 3.11.2. Design Considerations for USIM Connector For 8-pin USIM connector, it is recommended to use Molex 91228. Please visit http://www.molex.com for more information. Figure 24: Molex 91228 USIM Connector Table 13: Pin Description of Molex USIM Connector Name Pin Function VDD C1 USIM card power supply. RST C2 USIM card reset. CLK C3 USIM card clock. / C4 Not defined. GND C5 Ground. VPP C6 Not connected. DATA I/O C7 USIM card data. / C8 Pull-down GND with external circuit. When the tray is present, C4 is connected to C8.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 45 / 84 For 6-pin USIM connector, it is recommended to use Amphenol C707 10M006 512 2. Please visit http://www.amphenol.com for more information. Figure 25: Amphenol C707 10M006 512 2 USIM Card Connector Table 14: Pin Description of Amphenol USIM Connector Name Pin Function VDD C1 USIM card power supply. RST C2 USIM card reset. CLK C3 USIM card clock. GND C5 Ground. VPP C6 Not connected. DATA I/O C7 USIM card data.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 46 / 84 3.12. USB Interface UC20 contains one integrated Universal Serial Bus (USB) transceiver which complies with the USB 2.0 specification and supports high speed (480 Mbps), full speed (12 Mbps) and low speed (1.5 Mbps) mode. The USB interface is primarily used for AT command, data transmission, GNSS NMEA sentences output, software debug and firmware upgrade. The following table shows the pin definition of USB interface. Table 15: USB Pin Description Pin Name Pin No. I/O Description Comment USB_DP 69 IO USB differential data bus (positive). Require differential impedance of 90Ω. USB_DM 70 IO USB differential data bus (minus). Require differential impedance of 90Ω. USB_VBUS 71 PI Used for detecting the USB interface connected. 3.0~5.25V. Typical 5.0V. GND 72 Ground. More details about the USB 2.0 specifications, please visit http://www.usb.org/home. The following figure shows the reference circuit of USB interface. ModuleUSB_VBUSUSB_DPUSB_DMGNDUSB connectorClose to USB connectorDifferential layoutUSB_VBUSUSB_DPUSB_DMGNDESD ArrayNM_2pF Figure 26: Reference Circuit of USB Application

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 47 / 84 In order to ensure the USB interface design corresponding with the USB 2.0 specification, please comply with the following principles.  It is important to route the USB signal traces as differential pairs with total grounding. The impedance of USB differential trace is 90ohm.  Do not route signal traces under crystals, oscillators, magnetic devices and RF signal traces. It is important to route the USB differential traces in inner-layer with ground shielding not only upper and lower layer but also right and left side.  Pay attention to the influence of junction capacitance of ESD component on USB data lines. Typically, the capacitance value should be less than 2pF (e.g.ESD9L5.0ST5G).  Keep the ESD components as closer to the USB connector as possible. UC20 module can only be used as a slave device. The USB interface is recommended to be reserved for firmware upgrade in your design. The following figure shows the recommended test points. ModuleUSB_DMUSB_DPVBAT_BBUSB_VBUSPWRKEYGNDVBAT_RFUSB_DMUSB_DPVBATUSB_VBUSPWRKEYGNDConnector Figure 27: Test Points of Firmware Upgrade 3.13. PCM and I2C Interface UC20 provides one Pulse Code Modulation (PCM) digital interface for audio design, which supports the following modes:  Primary mode (short sync, works as both master and slave)  Auxiliary mode (long sync, works as master only) NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 48 / 84 In primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; the PCM_SYNC falling edge represents the MSB. In this mode, PCM_CLK supports 128, 256, 512, 1024, 2048 and 4096kHz for different speech codec. In auxiliary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; while the PCM_SYNC rising edge represents the MSB. In this mode, PCM interface operates with a 128kHz PCM_CLK and an 8kHz, 50% duty cycle PCM_SYNC only. UC20 supports 8-bit A-law and μ-law, and also 16-bit linear data formats. The following figures show the primary mode’s timing relationship with 8kHz PCM_SYNC and 2048kHz PCM_CLK and auxiliary mode’s timing relationship with 8kHz PCM_SYNC and 128kHz PCM_CLK. PCM_CLKPCM_SYNCPCM_OUTMSB LSB MSBMSB LSB MSBPCM_IN125us1 2 256255 Figure 28: Primary Mode Timing

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 49 / 84 PCM_CLKPCM_SYNCPCM_OUTMSB LSBPCM_IN125usMSB1 2 1615LSB Figure 29: Auxiliary Mode Timing The following table shows the pin definition of PCM and I2C interface which can be applied on audio codec design. Table 16: Pin Definition of PCM and I2C Interface Pin Name Pin No. I/O Description Comment PCM_IN 24 DI PCM data input. 1.8V power domain. PCM_OUT 25 DO PCM data output. 1.8V power domain. PCM_SYNC 26 IO PCM data frame sync signal. 1.8V power domain. PCM_CLK 27 IO PCM data bit clock. 1.8V power domain. I2C_SCL 41 DO I2C serial clock. Require external pull-up resistor. I2C_SDA 42 IO I2C serial data. Require external pull-up resistor. Clock and mode can be configured by AT command, and the default configuration is master mode using short sync data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, UC20’s firmware has integrated the configuration on NAU8814 application with I2C interface. Refer to document [1] about the command AT+QDAI for details.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 50 / 84 The following figure shows the reference design of PCM interface with external codec IC. PCM_INPCM_OUTPCM_SYNCPCM_CLKI2C_SCLI2C_SDANAU8814Module1.8V4.7K4.7KBCLKMCLKFSDACINADCOUTSCLKSDINBIASMIC_BIASMIC+MIC-SPKOUT+SPKOUT- Figure 30: Reference Circuit of PCM Application with Audio Codec 1. It is recommended to reserved RC (R=22Ω, C=22pF) circuit on the PCM lines, especially for PCM_CLK. 2. UC20 work as a master device pertaining to I2C interface. 3.14. ADC Function The module provides two analog-to-digital converters (ADC) to digitize the analog signal to 15-bit digital data such as battery voltage, temperature and so on. Using AT command AT+QADC=0 can read the voltage value on ADC0 pin. Using AT command AT+QADC=1 can read the voltage value on ADC1 pin. For more details of these AT commands, please refer to document [1]. In order to improve the accuracy of ADC, the trace of ADC should be surrounded by ground. Table 17: Pin Definition of the ADC Pin name Pin NO. Description ADC0 45 General purpose analog to digital converter. ADC1 44 General purpose analog to digital converter. NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 51 / 84 The following table describes the characteristic of the ADC function. Table 18: Characteristic of the ADC Parameter Min. Typ. Max. Unit ADC0 voltage range 0.2 2.1 V ADC1 voltage range 0.2 4.2 V ADC resolution 15 bits Offset error 3.5 % Gain error 2.5 % 3.15. Network Status Indication The network indication pins can be used to drive a network status indicator LED. The module provides two pins which are NET_MODE and NET_STATUS. The following tables describe pin definition and logic level changes in different network status. Table 19: Pin Definition of Network Indicator Pin Name Pin No. I/O Description Comment NET_MODE 5 DO Indicate the module network registration mode. 1.8V power domain. NET_STATUS 6 DO Indicate the module network activity status. 1.8V power domain. Table 20: Working State of the Network Indicator Pin name Status Description NET_MODE Always High. Registered in 3G network. Always Low. Others. NET_STATUS Flicker slowly (200ms High/1800ms Low). Networks searching. Flicker slowly (1800ms High/200ms Low). Idle. Flicker quickly (125ms High/125ms Low). Data transfer is ongoing. Always High. Voice calling.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 52 / 84 A reference circuit is shown in the following figure. 4.7K47KVBAT2.2KModuleNetwork Indicator Figure 31: Reference Circuit of the Network Indicator 3.16. Operating Status Indication 3.16.1. STATUS The STATUS pin is an open drain output for indicating the module operation status. You can connect it to a GPIO of DTE with pulled up, or as LED indication circuit as below. When the module is turned on normally, the STATUS will present the low state. Otherwise, the STATUS will present high-impedance state. Table 21: Pin Definition of STATUS Pin Name Pin No. I/O Description Comment STATUS 61 OD Indicate the module operation status. Require external pull-up. The following figure shows different design circuit of STATUS, you can choose either one according to your application demands.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 53 / 84 VDD_MCU10KModuleSTATUS MCU_GPIOModuleSTATUSVBAT2.2K Figure 32: Reference Circuit of the STATUS 3.16.2. SLEEP_IND The SLEEP_IND is an indicated pin for judging whether the module is in sleep mode or not. When the module enters into the sleep mode, the SLEEP_IND will output a logic high level. So you can use the SLEEP_IND for low current indication. The following table shows the pin definition of SLEEP_IND. Table 22: Pin Definition of SLEEP_IND Pin Name Pin No. I/O Description Comment SLEEP_IND 3 DO Indicate the sleep status. 1.8V power domain. Outputs high level when the module is in sleep mode.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 54 / 84 A reference circuit is shown in the following figure. 4.7K47KVBAT2.2KModuleSLEEP_IND Figure 33: Reference Circuit of the SLEEP_IND 3.17. Behavior of the RI You can use command AT+QCFG=“risignaltype”, “physical” to configure RI behavior: No matter which port URC is presented on, URC will trigger the behavior on RI pin. URC can be output from UART port, USB AT port and USB modem port by command AT+QURCCFG. The default port is USB AT port. In additional, RI behavior can be configured flexible. The default behavior of the RI is shown as below. Table 23: Behavior of the RI State Response Idle RI keeps high level. URC RI outputs 120ms low pulse when new URC returns. The RI behavior can be changed by command AT+QCFG=“urc/ri/ring”, refer to document [1] for details. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 55 / 84 4 GNSS Receiver 4.1. General Description UC20 includes a fully integrated global navigation satellite system solution that supports the latest generation gpsOne Gen8 of Qualcomm (GPS and GLONASS). Compared with GPS only, dual systems increase usable constellation, reduce coverage gaps and TTFF, and increase positioning accuracy, especially in rough urban environments. UC20 works in standalone mode, allows device to demodulate GNSS assistance data, calculate position without any assistance from the network, suitable for various application needing lowest-cost, accurate position determination. UC20 supports Qualcomm gpsOneXTRA technology (one kind of A-GNSS), which will download XTRA file from the internet server to enhance the TTFF. XTRA file contains predicted GPS and GLONASS satellites coordinates and clock biases valid for up to 7days. It is the best if XTRA file is downloaded once every 1-2 days. And UC20 also supports SBAS (including WAAS, EGNOS and MSAS), which will improve fix accuracy. UC20 provides power-saving solution named DPO (Dynamic Power Optimization), which attempts to turn off GNSS RF parts, reduces current consumption by 50% at most without impact on TTFF and extends battery life, maximizes talk and standby time as well. UC20 supports standard NMEA-0183 protocol, and outputs NMEA sentences with 1Hz via USB interface by default. By default, UC20 GNSS engine is switched off, it has to be switched on with AT command. For more details about GNSS engine technology and configurations, refer to document [7].

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 56 / 84 4.2. GNSS Performance The following table shows UC20 GNSS performance. Table 24: GNSS Performance Parameter Description Conditions Typ. Unit Sensitivity (GNSS) Cold start Autonomous -144 dBm With LNA -147 dBm Reacquisition Autonomous -154 dBm With LNA -159 dBm Tracking Autonomous -155 dBm With LNA -160 dBm TTFF (GNSS) Cold start @open sky Autonomous 32 s XTRA enabled 22 s Warm start @open sky Autonomous 29 s XTRA enabled 3 s Hot start @open sky Autonomous 2.5 s XTRA enabled 2 s Accuracy (GNSS) CEP-50 Autonomous @open sky <1.5 m 1. Tracking sensitivity: The lowest GPS signal level at the antenna port which the module does not fail to fix within 5 minutes by reducing signal intensity. 2. Reacquisition sensitivity: The lowest GPS signal level at the antenna port which the module fixes within 3 minutes by increasing signal intensity. 3. Cold start sensitivity: The lowest GPS signal level at the antenna port which the module fixes within 3 minutes by executing cold start command. NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 57 / 84 4.3. Layout Guideline The following layout guideline should be taken into account in your design.  Maximize the distance between the GNSS antenna and the main UMTS antenna.  Noisy digital circuits such as the USIM card, USB interface, Camera module, Display connector and SD card should be away from the antenna.  Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar isolation and protection.  Keep 50 ohm characteristic impedance of the ANT_GNSS trace. Refer to chapter 5 for GNSS reference design and antenna consideration.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 58 / 84 5 Antenna Interface UC20 antenna interface includes a main UMTS antenna, an optional UMTS Rx-diversity antenna, which is used to improve UMTS’s receiving performance, and a GNSS antenna. The antenna interface has an impedance of 50Ω. 5.1. UMTS Antenna Interface 5.1.1. Pin Definition The main antenna and UMTS Rx-diversity antenna pins definition are shown below. Table 25: Pin Definition of the RF Antenna Pin Name Pin No. I/O Description Comment ANT_MAIN 49 IO Main antenna 50Ω impedance ANT_DIV 35 AI Diversity antenna 50Ω impedance 5.1.2. Operating Frequency Table 26: The Module Operating Frequencies Band Receive Transmit Unit UMTS 1900 1930 ~ 1990 1850 ~ 1910 MHz UMTS 850 869 ~ 894 824 ~ 849 MHz 5.1.3. Reference Design The reference design of main antenna and UMTS Rx-diversity antenna is shown as below. It should reserve a π-type matching circuit for better RF performance. The capacitors are not mounted by default.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 59 / 84 ANT_MAINR1 0RC1ModuleMainantennaNMC2NMR2 0RC3Diversity antennaNMC4NMANT_DIV Figure 34: Reference Circuit of Antenna Interface Keep a proper distance between main antenna and diversity antenna to improve the receiving sensitivity. 5.2. GNSS Antenna Interface The following tables show the GNSS antenna pin definition and frequency specification. Table 27: Pin Definition of GNSS Antenna Pin Name Pin No. I/O Description Comment ANT_GNSS 47 AI GNSS antenna 50Ω impedance VDD_2V85 34 PO Power for external LNA or Vnorm=2.85V NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 60 / 84 active antenna. Table 28: GNSS Frequency Type Frequency Unit GPS 1575.42±1.023 MHz GLONASS 1597.5~1605.8 MHz 5.2.1. Reference Design for Passive Antenna PassiveantennaMAX2659ModuleANT_GNSS/SHDNGNDRFINGND RFOUTVCC VDD_2V85MCU_GPIO100pF 6.8nH220nF33pF51KNMNM56pFD1 Figure 35: Reference Circuit of GNSS Passive Antenna

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 61 / 84 5.2.2. Reference Design for Active Antenna ActiveantennaVDDModuleANT_GNSS47nH10R 0.1uF100pFNMNM Figure 36: Reference Circuit of GNSS Active Antenna 1. You can choose the corresponding reference circuit above according to your demands on antenna circuit design. 2. MAX2659 is the recommended LNA chip. You can disable LNA to save power with one GPIO shown in above figure. Pay attention to this pin’s voltage level. 3. VDD supplies power for active antenna. You can choose the right VDD according to the requirements for active antenna. This power circuit is not needed if passive antenna is applied here. 4. All NM capacitors are reserved for adjusting RF performance. 5. The capacitance of ESD component D1 should be less than 1Pf (e.g. LXES15AAA1-100). 5.3. Antenna Installation 5.3.1. Antenna Requirement The following table shows the requirement on /UMTS antenna and GNSS antenna. NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 62 / 84 Table 29: Antenna Requirements Type Requirements GNSS Frequency range: 1565~1607 MHz Polarization: RHCP or linear VSWR: < 2 (Typ.) Passive antenna gain: > 0dBi Active antenna noise figure: < 1.5dB Active antenna gain: > -2dBi Active antenna embedded LNA gain: 20dB (Typ.) Active antenna total gain: > 18dBi (Typ.) 5.3.2. Install the Antenna with RF Connector The following figure is the antenna installation with RF connector provided by HIROSE. The recommended RF connector is UF.L-R-SMT. Figure 37: Dimensions of the UF.L-R-SMT Connector (Unit: mm) You can use U.FL-LP serial connector listed in the following figure to match the UF.L-R-SMT.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 63 / 84 Figure 38: Mechanicals of UF.L-LP Connectors The following figure describes the space factor of mated connector Figure 39: Space Factor of Mated Connector (Unit: mm) For more details, please visit http://www.hirose.com.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 64 / 84 6 Electrical, Reliability and Radio Characteristics 6.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of module are listed in the following table: Table 30: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT_RF/VBAT_BB -0.3 4.7 V USB_VBUS -0.3 5.5 V Peak current of VBAT_BB 0 0.8 A Peak current of VBAT_RF 0 1.8 A Voltage at digital pins -0.3 2.3 V Voltage at ADC0 0 2.1 V Voltage at ADC1 0 4.2 V

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 65 / 84 6.2. Power Supply Ratings Table 31: The Module Power Supply Ratings Parameter Description Conditions Min. Typ. Max. Unit VBAT VBAT_BB and VBAT_RF Voltage must stay within the min/max values, including voltage drop, ripple and spikes. 3.4 3.8 4.3 V USB_VBUS USB detection 3.0 5.0 5.25 V 6.3. Operating Temperature The operating temperature is listed in the following table. Table 32: Operating Temperature Parameter Min Typ. Max Unit Normal Temperature -35 25 75 ºC Restricted Operation1) -40~ -35 75 ~ 85 ºC Storage Temperature -45 90 ºC 1. “1)” When the module works within the temperature range, the deviations from the RF specification may occur. For example, the frequency error or the phase error would increase. 2. The maximum surface temperature may be up to 100ºC when module works at 85ºC ambient temperature. 6.4. Current Consumption The values of current consumption are shown below. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 66 / 84 Table 33: The Module Current Consumption Parameter Description Conditions Min. Typ. Max. Unit IVBAT OFF state supply current Power down 45 uA WCDMA supply current (GNSS off) Sleep (USB disconnected) @ DRX=6 2.0 mA Sleep (USB disconnected) @ DRX=7 1.7 mA Sleep (USB disconnected) @ DRX=8 1.5 mA Sleep (USB disconnected) @ DRX=9 1.4 mA Idle (USB disconnected) @ DRX=6 14.0 mA Idle (USB connected) @ DRX=6 33.4 mA WCDMA data transfer (GNSS off) UMTS Band I HSDPA @max power 517 mA UMTS Band I HSUPA @max power 497 mA UMTS Band II HSDPA @max power 521 mA UMTS Band II HSUPA @max power 502 mA UMTS Band V HSDPA @max power 505 mA UMTS Band V HSUPA @max power 480 mA UMTS Band VIII HSDPA @max power 429 mA UMTS Band VIII HSUPA @max power 429 mA WCDMA voice call UMTS Band I @max power 445 mA UMTS Band II @max power 484 mA UMTS Band V @max power 475 mA UMTS Band VIII @max power 387 mA GNSS Off Idle, USB connected @ DRX=6 33.4 mA Cold Start (Autonomous) 80.6 mA Tracking (Autonomous) 71.2 mA NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 67 / 84 GNSS tracking current is tested in the following conditions:  For Cold Start, 10 minutes after First Fix.  For Hot Start, 15 seconds after First Fix. 6.5. RF Output Power The following table shows the RF output power of UC20 module. Table 34: Conducted RF Output Power Frequency Max. Min. UMTS 1900 22.5dBm+1/-1dB <-50dBm UMTS 850 22.5dBm+1/-1dB <-50dBm 6.6. RF Receiving Sensitivity The following table shows the conducted RF receiving sensitivity of UC20 module. Table 35: Conducted RF Receiving Sensitivity Frequency Receive Sensitivity (Typ.) UMTS 1900 -110dBm UMTS 850 -110dBm 6.7. Electrostatic Discharge The module is not protected against electrostatics discharge (ESD) in general. Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module. The following table shows the module electrostatics discharge characteristics.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 68 / 84 Table 36: Electrostatics Discharge Characteristics Tested Points Contact Discharge Air Discharge Unit VBAT, GND ±5 ±10 kV All antenna interfaces ±4 ±8 kV Other interfaces ±0.5 ±1 kV

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 69 / 84 7 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. All dimensions are measured in mm. 7.1. Mechanical Dimensions of the Module (32+/-0.15)(29+/-0.15) Figure 40: UC20 Top and Side Dimensions

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 70 / 84 3.43.2 3.4 3.2 3.4 3.24.832290.51.5 Figure 41: UC20 Bottom Dimensions (Bottom View) “XXXX” in pink on above figure is the PCB board code in the exposed copper. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 71 / 84 Figure 42: Bottom Pads Dimensions (Bottom View)

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 72 / 84 7.2. Footprint of Recommendation 321.97.8131.99.049.36.45 3.454.422.16.16290.81.34.8234.62.51.03.46.8 Figure 43: Recommended Footprint (Top View) 1. Keep out the area below the test point (circular area on the above figure) in the host PCB. 2. In order to maintain the module, keep about 3mm between the module and other components in the host PCB. NOTES

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 73 / 84 7.3. Top View of the Module Figure 44: Top View of the Module 7.4. Bottom View of the Module Figure 45: Bottom View of the Module

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 74 / 84 8 Storage and Manufacturing 8.1. Storage UC20 is stored in the vacuum-sealed bag. The restriction of storage condition is shown as below. Shelf life in sealed bag is 12 months at < 40ºC / 90%RH. After this bag is opened, devices that will be subjected to reflow solder or other high temperature process must be:  Mounted within 72 hours at factory conditions of ≤ 30ºC / 60%RH.  Stored at <10% RH. Devices require bake, before mounting, if:  Humidity indicator card is >10% when read 23ºC ± 5ºC.  Mounted for more than 72 hours at factory conditions of ≤o30ºC / 60% RH. If baking is required, devices may be baked for 48 hours at 125ºC ± 5ºC. As plastic container cannot be subjected to high temperature, Module needs to be taken out from container to high temperature (125ºC) bake. If shorter bake times are desired, please refer to IPC/JEDECJ-STD-033 for bake procedure. 8.2. Manufacturing and Welding The squeegee should push the paste on the surface of the stencil that makes the paste fill the stencil openings and penetrate to the PCB. The force on the squeegee should be adjusted so as to produce a clean stencil surface on a single pass. To ensure the module soldering quality, the thickness of stencil at the hole of the module pads should be 0.18mm. For details, please refer to document [6]. NOTE

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 75 / 84 It is suggested that peak reflow temperature is 235 ~ 245ºC (for SnAg3.0Cu0.5 alloy). Absolute max reflow temperature is 260ºC. To avoid damage to the module when it was repeatedly heated, it is suggested that the module should be mounted after the first panel has been reflowed. The following picture is the actual diagram which we have operated. Time50 100 150 200 250 30050100150200250 160 ºC 200 ºC217070s~120s40s~60sBetween 1~3 ºC/sPreheat Heating CoolingºCsLiquids Temperature Figure 46: Liquids Temperature 8.3. Packaging UC20 is packaged in the tap and reel carriers. One reel is 11.53m length and contains 250pcs modules. The figure below shows the package details, measured in mm.

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 76 / 84 30.3±0.1529.3±0.1530.3±0.1532.5±0.1533.5±0.150.35±0.054.2±0.153.1±0.1532.5±0.1533.5±0.154.00±0.12.00±0.11.75±0.120.20±0.1544.00±0.344.00±0.11.50±0.1 Direction of feedCover tape1310044.5+0.20-0.0048.5 Figure 47: Carrier Tape

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 77 / 84 9 Appendix A Reference Table 37: Related Documents SN Document Name Remark [1] UC20_AT_Commands_Manual UC20 AT Commands Manual [2] UC20_EVB_User_Guide UC20 EVB User Guide [3] UC20_Reference_Design UC20 Reference Design [4] UC20&M10_Reference_Design UC20 and M10 Compatible Reference Design [5] UC20&M10_Compatibilty_Design UC20 and M10 Compatibility Design Specification [6] Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide [7] UC20_GNSS_AT_Commands_Manual UC20 GNSS AT Commands Manual Table 38: Terms and Abbreviations Abbreviation Description AMR Adaptive Multi-rate ARP Antenna Reference Point bps bits per second CHAP Challenge Handshake Authentication Protocol CMUX Customer CS Coding Scheme CSD Circuit Switched Data CTS Clear To Send DRX Discontinuous Reception

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 78 / 84 DCE Data Communications Equipment (typically module) DTE Data Terminal Equipment (typically computer, external controller) DTR Data Terminal Ready DTX Discontinuous Transmission EFR Enhanced Full Rate ESD Electrostatic Discharge FR Full Rate GLONASS GLObalnaya NAvigatsionnaya Sputnikovaya Sistema, the Russian Global Navigation Satellite System GMSK Gaussian Minimum Shift Keying GNSS Global Navigation Satellite System GPS Global Positioning System GSM Global System for Mobile Communications HR Half Rate HSPA High Speed Packet Access I/O Input/Output IMEI International Mobile Equipment Identity Imax Maximum Load Current Inorm Normal Current LED Light Emitting Diode LNA Low Noise Amplifier MO Mobile Originated MS Mobile Station (GSM engine) MT Mobile Terminated PAP Password Authentication Protocol PBCCH Packet Switched Broadcast Control Channel

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 79 / 84 PCB Printed Circuit Board PDU Protocol Data Unit PPP Point-to-Point Protocol PSK Phase Shift Keying QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying RF Radio Frequency RHCP Right Hand Circularly Polarized RMS Root Mean Square (value) RTC Real Time Clock Rx Receive SIM Subscriber Identification Module SMS Short Message Service TDMA Time Division Multiple Access TE Terminal Equipment TX Transmitting Direction UART Universal Asynchronous Receiver & Transmitter UMTS Universal Mobile Telecommunications System URC Unsolicited Result Code USIM Universal Subscriber Identity Module USSD Unstructured Supplementary Service Data Vmax Maximum Voltage Value Vnorm Normal Voltage Value Vmin Minimum Voltage Value VIHmax Maximum Input High Level Voltage Value

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 80 / 84 VIHmin Minimum Input High Level Voltage Value VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage Value VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value VSWR Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access

UMTS/HSPA Module Series UC20 Hardware Design UC20_Hardware_Design Confidential / Released 81 / 84

UMTS/HSPA Module UC20 Hardware Design UC20_Hardware_Design Confidential / Released 82 / 84

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