Gigawit Electronics GWBMA1X Bluetooth Wireless Audio Module User Manual GWBMA1xdatasheetrev0 9

Gigawit Electronics Limited Bluetooth Wireless Audio Module GWBMA1xdatasheetrev0 9

user manual

rev. 0.9 06232016 GWBMA1x Gigawit Bluetooth Audio module GWBMA1x Datasheet (preliminary)
rev. 0.9 06232016 GWBMA1x 1. Introduction GWBMA1x BT Audio module is a low power consumption Bluetooth module for audio application. It is compatible with Bluetooth 4.2+EDR standard, providing high quality wireless audio solution to customer. 2. Feature Support Standby/Shutoff/Sleep modes Support serial ADC Keypad input I2S interface available for Audio codec UART USB1.1 GPIO and OTG for expansion Support up to 48kHz/16bit DAC sampling for Bluetooth stereo audio Bluetooth audio transmission; Bluetooth headset feature Firmware pre-programmed, no software or RF engineering resource needed Internal codec supports WAV, MP3, WMA, JPEG Audio, ACC* 3. Application This module can be applied for short distance audio transmission, such as wireless speaker, allowing smart device or computer to transmit audio signal to such devices. RF CPU 26MHz crystal DC/DC IAn3SDUART ADC SPI I2C USB Tx/Rx GPIO MIC I2S Analog output 3.3V SD/TF
rev. 0.9 06232016 GWBMA1x 4. Block Diagram 5. Parameters Item Parameter Bluetooth version Bluetooth V4.2+EDR protocols HFP/HSP,OPP,A2DP/AVRCP,PBAP profiles modulation PSK3bps, π/4-DQPSK 8DPSK frequency range 2.402GHz - 2.480GHz Tx power Fulfil FCC Class2 requirement Max Tx. power is +5dbm Sensitivity -90dbm Wireless S/N ratio 82db Antenna Operating voltage 3.2-4.2V Current consumption 45mA when playing music 32mA when pause Operating temperature -25 - 60 Storage temperature -40 - 135 Expansion interface USB UART GPIO IIC IIS I2S interface data: 16bit; sampling rate 8KHz 16KHz 22.05KHz 44.1KHz 48KHz Hareware Dimension (mm) 19 x 32x 1 PCB antenna .
rev. 0.9 06232016 GWBMA1x 6. Firmware GWBMA1x comes with standard firmware with either analog output (Pin 29 -30) or digital output (IIS). The firmware already embedded all the basic features, such as Bluetooth Audio, key input, LED control..etc. Customer needs no engineering resource on those basic features. Internal codec firmware GWBMA1X embedded with internal codec, which output analog signal directly. Customer can simply connect GWBMA1x analog output to earphone for audio play back, or to an audio amplifier. External codec firmware With this firmware, GWBMA1x will by-pass its internal codec and directly output the digital audio signal received from wireless side to I2S output, which is connected to an external codec. Customer can select different codec in order to satisfies different sound quality requirements. Beside the codec feature, any other feature of this firmware will be same as the Internal code firmware. Customised firmware GWBMA1X is a high performance and flexibility Bluetooth audio module, and there are many rooms for embedded features. It is possible to provide a customised firmware base on customer’s requirement base on the module hardware. Customer may contact us through our local partners for such customisation service. NRE will be needed for customisation service. Firmware loading Firmware can be loaded into GWBMA1X module through pin 16 and 17 by a JTAG adaptor. A window base application will be provided for loading a GWBMA1X firmware from computer to the module.
rev. 0.9 06232016 GWBMA1x 7. GWBMA1X diagram 8. Pin definition 18 GND Ground name description 36 GND Ground
rev. 0.9 06232016 GWBMA1x 9. Reference design and Evaluation kit Suggest external codec circuit Suggest reference circuit
rev. 0.9 06232016 GWBMA1x
rev. 0.9 06232016 GWBMA1x 10. Evaluation board GWBMA1X evaluation board provides a complete circuit GWBMA1X where customer can evaluate each feature of the standard firmware, or any customised firmware. Push buttons Except the RST button (system reset), 5 push buttons for controlling the music Play : Play, pause music and answer call Prev : Jump to previous song Next : Jump to next song Vol+, Vol- : Volume increment/decrement Codec output When external codec firmware loaded, the external codec on the EVK will be activated. The on board codec will then convert digital data from the module to LINE OUT and convert audio signal from LINE IN to the module. User can also connect the I2S related signal pin to his own codec circuit. GWBMA1X evaluation board
rev. 0.9 06232016 GWBMA1x When internal codec firmware is loaded, the module will decode the signal internally and output audio signal on the board; on the other hand, audio from MIC will also be coded in the module. Battery charger A Li-ion charger is also on board, customer can simply solder a 3.7V Li-ion battery to the board. The RED LED will turn on when charging. USB connector It is used as power supply of the board, and battery charging as well (if Li-ion battery connected). Data pin is also connect to GWBMA1X USB port, but is not yet enabled until future or customised firmware.
rev. 0.9 06232016 GWBMA1x 11. Layout requirement GWBMA1X is a sensitive RF device, and it is suggestion to be put on In order to obtain the best performance, GWBMA1X should be placed on corner of PCB, and keep certain distance from other components, especially metal components, such are speaker, transformer, battery, heat sink and metal plate. The diagram shows the layout for GWBMA1X module. Inappropriate installation may deteriorate the RF performance. GWAPA0x layout recommendation
rev. 0.9 06232016 GWBMA1x 12. GWBMA1X dimension Figure [11]: GWBMA1X dimension
rev. 0.9 06232016 GWBMA1x 13. Naming GW BMA 0x Variants Bluetooth Audio Gigawit prefix
rev. 0.9 06232016 GWBMA1x 14. Contact information Head quarter: Room 308, Building 25, Keyuan West Industrial Area, Nanshan District, Shenzhen City, Guangdong Province, China Tel: +86-755-86329300 Fax: +86-755-86329882 E-mail: info@gigawit.com Sales and marketing office: Tel: +852-91983405 Fax: +852 3013 8763 E-mail: sales@k-sol.com.hk
Integrator is reminded to assure that these installation instructions will not be made available to the end-user of the final host device. The final host device, into which this RF Module isintegrated" hasto be labelled with an auxilliary lable stating the FCC IDofthe RF Module, such as "Contains FCC ID: QECGWBMA1X" "This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1)this devicemay not cause harmful interference, and (2)this devicemust accept any interference received, including interference thatmay cause undesired operation." NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: --Reorient or relocate the receiving antenna. --Increase the separation between the equipment and receiver. --Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. --Consult the dealer or an experienced radio/TV technician for help. Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. (OEM) Integrator has to assure compliance of the entire end-product incl. the integrated RF Module. For 15 B (§15.107 and if applicable §15.107) compliance, the host manufacturer is required to show compliance with 15 while the module is installed and operating. Furthermore the module should be transmitting and the evaluation should confirm that the module'sintentional emissions (15C) are compliant (fundamental / out-of-band). Finally the integrator has to apply the appropriate equipment authorization (e.g. Verification) for the new host device per definition in §15.101.

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