Digi 50M880 802.11b Wireless Module User Manual Digi Connect ME Wi ME Hardware Reference

Digi International Inc 802.11b Wireless Module Digi Connect ME Wi ME Hardware Reference

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      TMTM90000631_ADC_ME-HWR.book Page 1 Thursday, July 1, 2004 11:12 AM
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 Digi International Inc. 2004. All Rights Reserved.The Digi logo is a registered trademark of Digi International, Inc. Connectware and Digi Connect ME and Digi Connect Wi-ME are trademarks of Digi International, Inc.NetSilicon, NET+Works, NET+OS, and NET+ are trademarks of NetSilicon, Inc. All other trademarks mentioned in this document are the property of their respective owners. Information in this document is subject to change without notice and does not represent a commitment on the part of Digi International. Digi provides this document “as is,” without warranty of any kind, either expressed or implied, including, but not limited to, the implied warranties of fitness or merchantability for a particular purpose. Digi may make improvements and/or changes in this manual or in the product(s) and/or the program(s) described in this manual at any time. This product could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes may be incorporated in new editions of the publication.DC_ME-HWR.book Page 3 Thursday, July 1, 2004 11:12 AM
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5ContentsAbout This Document ................................................................................................................7Kits Contents....................................................................................................................7Related Documentation....................................................................................................8Support Information .........................................................................................................8Chapter 1: About the Digi Connect ME & Digi Connect Wi-ME Embedded Modules.9Overview ..........................................................................................................................9Types of Modules........................................................................................................... 10Connectors: Power and Device Interface.......................................................................12Connectors: Ethernet Interface....................................................................................... 13Connectors: Antenna...................................................................................................... 15Module LEDs ................................................................................................................. 15Chapter 2: About the Development Board .......................................................................17Overview ........................................................................................................................17Basic Description ...........................................................................................................18Port Descriptions............................................................................................................20Connectors and Blocks...................................................................................................23Switches..........................................................................................................................27Development Board LEDs .............................................................................................30Power Jack......................................................................................................................32Test points ......................................................................................................................33Chapter 3: Programming Considerations.........................................................................35Overview ........................................................................................................................35GPIO...............................................................................................................................36LEDs...............................................................................................................................38Reset............................................................................................................................... 38DC_ME-HWR.book Page 5 Thursday, July 1, 2004 11:12 AM
6 Flash............................................................................................................................... 40Appendix A Module Specifications.................................................................................... 41Network Interface .......................................................................................................... 41Serial Interface............................................................................................................... 42Data Rates (bps)............................................................................................................. 42Flow Control Options..................................................................................................... 42GPIO .............................................................................................................................. 42DC Characteristics ......................................................................................................... 43Environmental................................................................................................................ 44Mechanical..................................................................................................................... 45Dimensions..................................................................................................................... 46Recommended PCB Layout........................................................................................... 51Antenna Information...................................................................................................... 53RF Exposure Statement.................................................................................................. 54Safety Statements........................................................................................................... 55Appendix B Certifications.................................................................................................. 57FCC Part 15 Class B ...................................................................................................... 57Industry Canada ............................................................................................................. 58Declaration of Conformity............................................................................................. 59International EMC Standards......................................................................................... 60Safety Standards............................................................................................................. 60Appendix C Sample Application: TTL Signals to EIA-232 ............................................ 61DC_ME-HWR.book Page 6 Thursday, July 1, 2004 11:12 AM
7••••••••••••••••••••••••••••••••••••••••••••••••••••••••About This DocumentScope of the Reference ManualThe purpose of this document is to enable developers to integrate the Digi Connect ME or Digi Connect Wi-ME embedded modules with other devices, enabling these devices to make use of the module’s rich networking features.Note Unless mentioned specifically by name, the products will be referred to as the embedded modules or modules. Individual naming is used to differentiate product specific features.Kits ContentsThis manual is intended for customers who use embedded modules Integration Kits or Development Kits, which are described below. About the Integration KitThe integration kit is the ideal platform for product evaluation, rapid prototyping, and integration of the embedded modules. Targeted specifically at customers who want to take advantage of the embedded modules with Digi plug-and-play firmware functionality, it enables integration of the modules without any extensive embedded software development with all the additional flexibility and benefits of web user interface customization and application specific java applets. About the Development KitThe Digi Connect ME or Digi Connect Wi-ME Development Kit are easy-to-use and royalty-free development platforms that significantly reduces traditional design risk and DC_ME-HWR.book Page 7 Thursday, July 1, 2004 11:12 AM
Related Documentation8Digi Connect Wi-ME & Digi Connect ME Hardware Referenceaccelerates the overall software development process. The kits deliver the integrated building blocks to quickly and cost effectively create your own custom firmware for an embedded module based high-performance networking solution that fits the specific requirements of your application.Related DocumentationSee the NS7520 Hardware Reference for information on the NS7520 chip.Support InformationTo get help with a question or technical problem or make comments and recommendations about Digi products and documentation, use the following contact information.General Customer Service and SupportDigi International11001 Bren Road EastMinnetonka, MN 55343U.S.A.United States: 1 877-912-3444Other Locations: 1 952-912-3444www.digi.com/support/www.digi.comDC_ME-HWR.book Page 8 Thursday, July 1, 2004 11:12 AM
9About the Digi Connect ME & Digi Connect Wi-ME Embedded ModulesCHAPTER 1OverviewThe embedded modules provide fully transparent device connectivity over industry-standard Ethernet connections and allows both equipment manufacturers and systems integrators to network-enable products at a fraction of the time and cost required to develop a custom solution. It is a highly flexible and compact single component solution with a serial port, GPIO ports, and a robust on-board TCP/IP stack and 10/100 BASE-T Ethernet support or wireless interface..From medical systems to building control and industrial automation, in virtually any application where embedded device connectivity over Ethernet or wireless connectivity is needed, embedded modules are the ideal choice, delivering high-performance functionality.Note Unless mentioned specifically by name, the products will be referred to as the embedded modules or modules. Individual naming is used to differentiate product specific features.This chapter provides information about the modules hardware and contains the following topics:"Types of Modules" on page 10"Connectors: Antenna" on page 15"Connectors: Ethernet Interface" on page 13DC_ME-HWR.book Page 9 Thursday, July 1, 2004 11:12 AM
Types of Modules10 Digi Connect Wi-ME & Digi Connect ME Hardware Reference"Module LEDs" on page 15Types of ModulesThe type of module that you will use for hardware integration depends on the kit you are using. If you are using an integration kit, you will be using a module without a JTAG interface. If you are using a development kit, you will be using a module with a JTAG interface.Note JTAG is a commonly used term that is also referred to as IEEE 1149.1, an industry standard test protocol. JTAG is an abbreviation for the European Joint Test Action Group, which invented the first versions of the IEEE 1149.1 interface. The JTAG interface, along with the other development tools, enables you to download, run and debug programs on the module.The following figures show the two types of modules. Digi Connect ME ModulesModel Description FigureDC-ME-01T-JTUsed for development purposes onlyJTAG interfaceDC_ME-HWR.book Page 10 Thursday, July 1, 2004 11:12 AM
11About the Digi Connect ME & Digi Connect Wi-ME Embedded ModulesDC-ME-01T-SDC-ME-01T-CNo JTAG interfaceOrdered independently of either kit for use in your implementation. Digi Connect ME ModulesModel Description FigureDigi Connect Wi-ME ModulesModel Description FigureDC-WIME-01T-JTUsed for development purposes onlyJTAG interfaceDC-WIME-01T-SDC-WIME-01T-CNo JTAG interfaceOrdered independently of either the development or integration kit for use in your implementation. DC_ME-HWR.book Page 11 Thursday, July 1, 2004 11:12 AM
Connectors: Power and Device Interface12 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceNote -S: No JTAG for use with Digi Firmware-C: No JTAG for use with Custom Firmware-JT: With JTAG for use with custom firmware developmentConnectors: Power and Device InterfaceThe module has a 20-pin male connector that supports a serial interface with data rates up to 230,400 bps and full-modem control, and GPIO ports. See the following figure for pin orientation and the table for pin assignments. Note Digi recommends 100 pF capacitors to circuit ground on all inputs and outputs to the module for ESD immunity. This includes the power pass-thru pins if they are not used.Power and Device Interface ConnectorPower and Device Interface Connector Pin AssignmentsPin Signal Description1 VETH+ Power Pass-Thru +2 VETH- Power Pass-Thru - 3-6 — Position RemovedDC_ME-HWR.book Page 12 Thursday, July 1, 2004 11:12 AM
13About the Digi Connect ME & Digi Connect Wi-ME Embedded ModulesNote The development board provides a reference design of a POE (Power Over Ethernet) power supply. A schematic for this reference design is installed by the setup program on the CD.Connectors: Ethernet InterfaceThe Ethernet connector is an 8-wire RJ-45 jack that meets the ISO 8877 requirements for 10/100BASE-T. See the following figure and table for pin orientation and pin assignments.Note Pin orientation and assignments are the same for modules with or without a JTAG connector.7 RXD Receive Data (Input)8 TXD Transmit Data (Output)9 RTS / GPIO 4 Request to Send (Output) / GPIO10 DTR / GPIO 5Data Terminal Ready (Output) / GPIO11 CTS / GPIO 2 Clear to Send (Input) / GPIO12 DSR / GPIO 3 Data Set Ready (Input) / GPIO13 DCD / GPIO 1Data Carrier Detect (Input) / GPIO14 RESET Reset15 +3.3V Power16 GND Ground17-19 — Reserved. Do not connect.20 /INIT Software ResetPower and Device Interface Connector Pin AssignmentsPin Signal DescriptionDC_ME-HWR.book Page 13 Thursday, July 1, 2004 11:12 AM
Connectors: Ethernet Interface14 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceEthernet Interface Pin OrientationEthernet Interface Pin AssignmentsPin1Pin2Pin3Pin4Pin5Pin6Pin7Pin8TXD+ TXD- RXD+ EPWR+ EPWR+ RXD- EPWR- EPWR-Transmit Data +Transmit Data -Receive Data +Power from Switch +Power from Switch +Receive Data -Power from Switch -Power from Switch -00000021Pin 1Pin 8DC_ME-HWR.book Page 14 Thursday, July 1, 2004 11:12 AM
15About the Digi Connect ME & Digi Connect Wi-ME Embedded ModulesConnectors: AntennaThe Digi Connect Wi-ME is available with 1 RP-SMA connector. The antenna is connected to the module with a reverse polarity SMA connector (sub-miniature size A). The antenna only fits on the module one way to ensure a proper connection. Another option for both signal reception and design flexibility is to use a "pig tail" cable (Digi part number DC-ANT-EC) to separate the antenna from the module. This allows the module to fit inside your product but the antenna to be placed outside the device. Module LEDsThe module has two LEDs that are located near the upper corners of the Ethernet port (see the following figure). The following table describes the LEDs.Note The LEDs are the same for a module with or without a JTAG connector.Antenna SpecificationsType DipolePart number DC-ANT-24DPGain 2 dBiCaution: This Part 15 radio device operates on a non-interference basis with other devices operating at this frequency when using the antennaelisted in the Antenna Specification table. Any changes or modification touser’s authority to operate the device.the product not expressly approved by Digi International could void theDC_ME-HWR.book Page 15 Thursday, July 1, 2004 11:12 AM
Module LEDs16 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceLED LocationsLED DescriptionsLED Color DescriptionNetwork Link (left-upper) YellowNetwork Link is operational: On (continuously) indicates that an Ethernet connection is made or an access point is engaged.Network Activity/Diagnostic (right-upper) GreenNetwork Activity: On when network traffic detected; off when no network traffic detected.Diagnostic: Flashes three times in even duration during power up or reset, indicating successful startup.DC_ME-HWR.book Page 16 Thursday, July 1, 2004 11:12 AM
17About the Development BoardCHAPTER 2OverviewThe development board is a hardware platform from which you can determine how to integrate the embedded modules into your design. The board consists of the following main features:Socket for connecting the embedded modulesJTAG connection (for use with the development kit only)GPIO switchesSerial and GPIO portsPower inputThis chapter provides information on development board components and contains the topics listed below. For more detailed information on the development board, see the schematic and mechanical drawings on the CD that accompanies your integration kit or development kit. (If you have installed the integration kit or development kit, you can access the schematic from the Start menu.) "Basic Description" on page 18"Placement of Module" on page 20"Connectors and Blocks" on page 23"Switches" on page 27"Development Board LEDs" on page 30"Power Jack" on page 32DC_ME-HWR.book Page 17 Thursday, July 1, 2004 11:12 AM
Basic Description18Digi Connect Wi-ME & Digi Connect ME Hardware Reference"Test points" on page 33Basic DescriptionThe development board contains connectors, switches, and LEDs for use while integrating the embedded module into your design. See the following figure for the location of the connectors, switches, and LEDs. Additionally, the board provides test points (not shown on the figure). For more information about test points, see "Test points" on page 33. Board Layout00000005P8P8P11P11P4CR2CR2P3P3CR16CR16CR6CR6CR15CR15P6P6SW2SW2P9P9SW3SW3CR4CR4CR9CR9CR5CR5CR1CR1P7P7P2P2SW1SW1P1P1CR8CR8CR7CR7CR11CR11CR10CR10CR13CR13CR12CR12CR14CR14CR3CR3CR17CR171234567810111213141516P12P129DC_ME-HWR.book Page 18 Thursday, July 1, 2004 11:12 AM
19About the Development BoardCaution When handling the development board, wear a grounding wrist strap to avoid ESD damage to the board.For more detailed information on connectors, switches and LEDs, see the following:"Port Descriptions" on page 20"Connectors and Blocks" on page 23"Switches" on page 27"Development Board LEDs" on page 30"Power Jack" on page 32The development board accepts either of the following modules: Module without JTAG connector—for use with an integration kitModule with JTAG connector—for use with a development kitSee the following figures for placement of either module onto the development board.Connectors, Switches and LEDs 1-8Pin 1Pin 2Pin 3Pin 4Pin 5Pin 6Pin 7Pin 8Secondary Serial Port, P2LEDs, CR1 -CR9GPIO Switch Bank, SW1GPIO Switch Bank, SW2JTAG Header, P4Jumper Block, P12 (Reserved)Embedded Module Connector, P7JTAG Connector, P8Connectors, Switches and LEDs 9-16 (continued)Pin 9Pin 10 Pin 11 Pin 12 Pin 13 Pin 14 Pin 15 Pin 16Primary Serial Port, P1 GPIO Port, P3 LEDs, CR10 -CR14Digital Signal Monitor Jack, P6LEDs, CR15 and CR16Reset Switch,SW3LED, CR17 Power Jack, P11DC_ME-HWR.book Page 19 Thursday, July 1, 2004 11:12 AM
Port Descriptions20Digi Connect Wi-ME & Digi Connect ME Hardware ReferencePlacement of ModuleCaution If you handle the module, wear a grounding wrist strap to avoid ESD damage.Port DescriptionsThe development board provides the following ports:Primary Serial Port, P1Secondary Serial Port, P2GPIO Port, P3See the figure titled "Board Layout" on page 18 for the location of the ports. The following sections describe the ports. Primary Serial Port, P1The Primary Serial Port is a DB-9 male connector that is labeled as P1 on the development board. The port is used with the integration kit and the development kit. See the following figure for pin orientation; see the following table for pin assignments.00000015Module connectorDevelopmentboardModule withJTAG connectorModule JTAGconnectorDC_ME-HWR.book Page 20 Thursday, July 1, 2004 11:12 AM
21About the Development BoardPrimary Serial Port Pin OrientationSecondary Serial Port, P2The Secondary Serial Port is a DB-9 male connector that is labeled as P2 on the development board. The port is used only with the Digi Connect ME modules with JTAG interfaces (in the development kit) for debugging purposes. See the following figure for pin orientation; see the following table for pin assignments.Primary Serial Port Pin AssignmentsPin1Pin2Pin3Pin4Pin5Pin6Pin7Pin8Pin9DCD RXD TXD DTR GND DSR RTS CTS —Data Carrier DetectReceive DataTransmit DataData Terminal ReadySignal/Chassis GroundData Set ReadyRequest To SendClear To Send—00000006Pin 1 Pin 5Pin 6 Pin 9DC_ME-HWR.book Page 21 Thursday, July 1, 2004 11:12 AM
Port Descriptions22Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceSecondary Serial Port Pin OrientationGPIO Port, P3The GPIO port is a 10-pin male right-angle connector that is labeled as P3 on the development board. The port is used with the integration kit and the development kit. See the following figure for pin orientation; see the following tables for pin assignments. For input and output threshold specifications, see "DC Characteristics" on page 43.Note The development board is shipped with a 10-pin screw-flange plug attached to the GPIO port.Secondary Serial Port Pin AssignmentsPin 1Pin 2Pin 3Pin 4Pin 5Pin 6Pin 7Pin 8Pin 9—RXD TXD—GND————— Receive DataTransmit Data— Signal/Chassis Ground————00000006Pin 1 Pin 5Pin 6 Pin 9DC_ME-HWR.book Page 22 Thursday, July 1, 2004 11:12 AM
23About the Development BoardGPIO Port Pin OrientationConnectors and BlocksThe development board provides the following connectors and blocks:Embedded Module Connector, P7Module JTAG Interface Connector, P8JTAG Debugger Connector, P4Jumper Block, P12Logic Analyzer Header, P6See the figure titled "Board Layout" on page 18 for the location of the connectors and blocks. The following sections describe the connectors and blocks.Embedded Module Connector, P7The Digi Connect ME embedded module Connector is a 20-pin female vertical header that is labeled P7 on the development board. The connector is used with the integration kit and Pin 1 Pin 1000000020GPIO Port Pin AssignmentsPin1Pin2Pin3Pin4Pin5Pin6Pin7Pin8Pin9Pin10Signal GND GPIO-5 GND GPIO-4 GND GPIO-3 GND GPIO-2 GND GPIO-1DC_ME-HWR.book Page 23 Thursday, July 1, 2004 11:12 AM
Connectors and Blocks24Digi Connect Wi-ME & Digi Connect ME Hardware Referencethe development kit. See the following figure for pin orientation; see the following table for pin assignments.Note: The figure shows the connector using the same orientation as shown in the figure titled "Board Layout" on page 18.Embedded Module Connector Pin OrientationModule Connector Pin AssignmentsPin Signal Description1 VETH+ Power Pass-Thru + Unused on Digi ConnectWi-ME2 VETH- Power Pass-Thru - 3 — Position Removed4 — Position Removed5 — Position Removed6 — Position Removed7 RXD Receive Data (Input)8 TXD Transmit Data (Output)9RTS / GPIO-4 Request to Send (Output) / GPIO10 DTR / GPIO-5 Data Terminal Ready (Output) / GPIOPin 20Pin 1Pin 19Pin 200000008DC_ME-HWR.book Page 24 Thursday, July 1, 2004 11:12 AM
25About the Development BoardModule JTAG Interface Connector, P8The Module JTAG Interface Connector is a 14-pin female vertical header that is labeled P8 on the development board. The connector mates with the JTAG connector on the Digi Connect ME embedded module. The Module JTAG Connector pins are tied to the JTAG debugger Connector (see “JTAG Debugger Connector, P4”). Note Because there is no direct connection to the Module JTAG Interface Connector, pin orientation and pin assignments are not described for the connector.11 CTS / GPIO-2 Clear to Send (Input) / GPIO12 DSR / GPIO-3 Data Set Ready (Input) / GPIO13 DCD / GPIO-1 Data Carrier Detect (Input) / GPIO14 RESET Reset15 +3.3V Power16 GND Ground17 — Reserved. Do not connect.18 — Reserved. Do not connect.19 — Reserved. Do not connect.20 /INIT Soft ResetModule Connector Pin AssignmentsPin Signal DescriptionDC_ME-HWR.book Page 25 Thursday, July 1, 2004 11:12 AM
Connectors and Blocks26Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceJTAG Debugger Connector, P4The JTAG debugger connector is a 14-pin male vertical header that is labeled P4 on the development board. The connector mates with a JTAG debugger plug (for example, a Macraigor Raven). The connector is used with the development kit only. See the following figure for pin orientation. See the following table for pin assignments.Note The figure shows the connector using the same orientation as shown in the figure titled "Board Layout" on page 18.JTAG Debugger Connector Pin OrientationJumper Block, P12This jumper block is reserved for future use. Logic Analyzer Header, P6The Logic Analyzer Header is a 20-pin male vertical header that is labeled P6 on the development board. The header is for connecting a digital signal analyzer (for example, a logic analyzer) to the development board. The header is used with the development kit 00000011Pin 13 Pin 1Pin 14 Pin 2JTAG Debugger Connector Pin AssignmentsPin 1Pin 2Pin 3Pin 4Pin 5Pin 6Pin 7Pin 8Pin 9Pin 10 Pin 11 Pin 12 Pin 13 Pin 14VCC+ GND /TRST GND TDI GND TMS GND TCKRXD GND TDO ICETRST VCC+ GNDDC_ME-HWR.book Page 26 Thursday, July 1, 2004 11:12 AM
27About the Development Boardonly. See the following figure for pin orientation; see the following table for pin assignments.Note The figure shows the connector using the same orientation as shown in the figure titled "Board Layout" on page 18.Logic Analyzer Header Pin OrientationSwitchesThe development board provides the following switches:GPIO Switch Bank 1, SW1GPIO Switch Bank 2, SW2Reset, SW3See the figure titled "Board Layout" on page 18 for the location of the switches. The following sections describe the switches.Pin 2Pin 20Pin 1Pin 1900000013Logic Analyzer Header Pin AssignmentsPin 1-8 Pin9Pin10 Pin11 Pin12 Pin13 Pin14 Pin15 Pin16 Pin17 Pin18 Pin19 Pin20NotConnected /RST NotConnected GPIO-5 TXD2 GPIO-4 RXD2 GPIO-3 TXD GPIO-2 RXD GPIO-1 GNDDC_ME-HWR.book Page 27 Thursday, July 1, 2004 11:12 AM
Switches28Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceGPIO Switch Bank 1, SW1GPIO Switch Bank 1, labeled SW1, is a set of five slide switches that allows the Digi Connect ME embedded module to use either serial signals or GPIO signals to communicate with a device. The switch is used with the Digi Connect ME embedded module Integration Kit and the Digi Connect ME embedded module Development Kit. In addition, the switch is used in conjunction with GPIO Switch Bank 2, SW2. See the following table for switch definitions of GPIO Switch Bank 1. GPIO Switch Bank 1 SettingsSwitch Number Left Position Right Position1DCDGPIO-12CTSGPIO-23DSRGPIO-34RTSGPIO-45DTRGPIO-5DC_ME-HWR.book Page 28 Thursday, July 1, 2004 11:12 AM
29About the Development BoardGPIO Switch Bank 2, SW2GPIO Switch Bank 2, labeled SW2, is a set of five slide switches that set GPIO inputs to logic levels of high (switch to left) or low (switch to right). If the GPIO port is configured as an output, then the switch should always be to the left. If there is an external device connected to P3, the switch should always be set to the left.Each GPIO port can be used independently.Notes1These switches do not determine whether the GPIO is an input or output. That is determined by the module software. 2If GPIO is set to an output by software, switch SW2 must be set to the left (high). 3These switches are used with the integration kit and the development kit and in conjunction with GPIO Switch Bank 1, SW1.Reset, SW3The Reset switch is a push button switch labeled SW3 on the development board. Pressing the switch holds the Digi Connect ME embedded module in reset. When the push button is released, the module reboots.DC_ME-HWR.book Page 29 Thursday, July 1, 2004 11:12 AM
Development Board LEDs30Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceDevelopment Board LEDsThe development board contains 17 LEDs that are labeled CR1 through CR17. The following table lists and describes the LEDs.Development Board LED DescriptionsBoard Label DescriptionColor or StateIndicationCR1 TXD, Secondary Serial PortFlickering Serial activityGreen Inactive CR2 RXD, Secondary Serial PortFlickering Serial activityGreen Inactive CR3 CTS, Primary Serial PortYellow ActiveGreen Inactive Off Not connected or signal not being drivenCR4 DTR, Primary Serial PortYellow Active Green Inactive Off Not connected or signal not being drivenCR5 TXD, Primary Serial PortFlickering Serial activityGreen Inactive CR6 RXD, Primary Serial PortFlickering Serial activityGreen InactiveDC_ME-HWR.book Page 30 Thursday, July 1, 2004 11:12 AM
31About the Development BoardCR7 RTS, Primary Serial PortYellow ActiveGreen InactiveOff Not connected or signal not being drivenCR8 DCD, Primary Serial PortYellow ActiveGreen InactiveOff Not connected or signal not being drivenCR9 DSR, Primary Serial PortYellow ActiveGreen InactiveOff Not connected or signal not being drivenCR10 GPIO-1 Input/OutputOn Logic highOff Logic lowCR11 GPIO-2 Input/OutputOn Logic highOff Logic lowCR12 GPIO-3 Input/OutputOn Logic highOff Logic lowDevelopment Board LED DescriptionsBoard Label DescriptionColor or StateIndicationDC_ME-HWR.book Page 31 Thursday, July 1, 2004 11:12 AM
Power Jack32Digi Connect Wi-ME & Digi Connect ME Hardware ReferencePower JackThe Power Jack is a barrel connector that accepts 9 to 30 VDC +/- 5%. The jack is labeled as P11 on the development board. The following table shows the polarity of the power jack.CR13 GPIO-4 Input/OutputOn Logic highOff Logic lowCR14 GPIO-5 Input/OutputOn Logic highOff Logic lowCR15 3.3V IndicatorOn Power onOff Power offCR16 5V IndicatorOn Power onOff Power offCR17 EPWR, Powered Ethernet EnabledOnEthernet power present from external powered Ethernet connector (Ethernet hub or switch)Off No powered Ethernet voltageDevelopment Board LED DescriptionsBoard Label DescriptionColor or StateIndicationDC_ME-HWR.book Page 32 Thursday, July 1, 2004 11:12 AM
33About the Development BoardThe following figure schematically represents the polarity of the power jack.Power Jack Polarity, SchematicTest pointsThe development board provides 24 test points that can be identified by board label or test point number. The board labels are adjacent to each test point on the board. The test point numbers are in the development board schematic drawings. The following table lists the test point number, board label, and a brief description of each test point.Power Jack PolarityContact PolarityCenter +9 to +30 VDCOuter GroundGround +9 to +30 VDC00000014Test Point DescriptionsTest Point Board Label DescriptionTP1 RI RI (test point supported only)DC_ME-HWR.book Page 33 Thursday, July 1, 2004 11:12 AM
Test points34Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceTP2 TX TXD-2, Transmit, Secondary Serial PortTP3 RX RXD-2, Receive, Secondary Serial PortTP4 CTS CTS, Primary Serial PortTP5 DTR DTR, Primary Serial PortTP6 TX TXD, Primary Serial PortTP7 RX RXD, Primary Serial PortTP8 RTS RTS, Primary Serial PortTP9 DCD DCD, Primary Serial PortTP10 DSR DSR, Primary Serial PortTP11 GPIO1 GPIO-1TP12 GPIO2 GPIO-2TP13 GPIO3 GPIO-3TP14 GPIO4 GPIO-4TP15 GPIO5 GPIO-5TP16 GND GroundTP17 3.3V 3.3V SupplyTP18 GND GroundTP19 5V 5.0V SupplyTP20 RESET Reset (active low)TP21 E+ Ethernet Power +TP22 E- Ethernet Power -TP23 V-IN 9-30 VDC InputTP24 GND GroundTest Point DescriptionsTest Point Board Label DescriptionDC_ME-HWR.book Page 34 Thursday, July 1, 2004 11:12 AM
35Programming ConsiderationsCHAPTER 3OverviewThis chapter provides information programmers may require to make use of some Digi Connect ME hardware resources. It provides information on the following topics:"GPIO" on page 36"LEDs" on page 38"Reset" on page 38"Flash" on page 40"Memory" on page 40DC_ME-HWR.book Page 35 Thursday, July 1, 2004 11:12 AM
GPIO36Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceGPIOGeneral InformationThe NS7520 processor supports 16 general purpose I/O (GPIO) lines, some of which are reserved for specific functions and some of which can be customized. These GPIO lines fall into three categories: Those labeled “Reserved” in the following table are reserved for a specific use and must not be reprogrammed, or the unit might not operate correctly. Often, these lines are not connected to external interfaces. Those labeled “Allocated” in the following table are exposed to an external interface and allocated to a specific use by the software, but can be customized safely with code modifications.Those labeled “Available” are exposed to an external interface, not controlled directly by the software, and can be customized.Two registers govern the 16 GPIO lines. These registers are named PORTA and PORTC. Each GPIO pin has four bits which completely describe its behavior, and each register is responsible for eight GPIO pins. The four bits that describe the GPIO behavior are its mode (CMODE), its direction (CDIR), its special function (CSF--only applicable to PORTC), and the data value. The first three bits describe the functionality of the GPIO pin. The "data" bit provides the current value of the pin when read and allows one to control the value of an output pin when written.In order to configure any GPIO pin as a GPIO input, the corresponding bit positions in the appropriate register must be configured as: CMODE = 0 CDIR = 0 CSF = 0In order to configure any GPIO pin as a GPIO output, the corresponding bit positions in the appropriate register must be configured as: CMODE = 0 CDIR = 1 CSF = 0Since each register controls 8 GPIO lines, it is safest to read the full 32 bit register, modify the bits corresponding to the GPIO line of interest, and then write the full 32 bits back. In this way, the behavior of the other GPIO lines will be preserved. For more information regarding the format and programming of the GPIO registers, see the NS7520 Hardware Reference.DC_ME-HWR.book Page 36 Thursday, July 1, 2004 11:12 AM
37Programming ConsiderationsDigi Connect ME GPIO pin useName Register Bit Category External Interface DescriptionSerial transmit PORTA7 Allocated Pin 8 on the 20 pin header Used for serial transmit. It could be reassigned as GPIO input or output and used for a general purposes.DTR/GPIO5 PORTA6 Allocated Pin 10 on the 20 pin header Used for the serial DTR signal. It can be reassigned as either GPIO input or output and used for a general purpose. If used in conjunction with the development board, this pin maps to GPIO5.RTS/GPIO4 PORTA5 Allocated Pin 9 on the 20 pin header.Used for the serial RTS signal. It could be reassigned as either GPIO input or output and used for a general purpose. If used in conjunction with the development board, this pin maps to GPIO4.NA PORTA4 Reserved NA NASerial receive PORTA3 Allocated Pin 7 on 20 pin header, Used for serial receive. It could be reassigned as either GPIO input or output and used for a general purpose.DSR/GPIO3 PORTA2 Allocated Pin 12 on 20 pin headerUsed for the serial DSR signal. It could be reassigned as either GPIO input or output and used for a general purpose. If used in conjunction with the development board, this pin maps to GPIO3.CTS/GPIO2 PORTA1 Allocated Pin 11 on 20 pin header Used for the serial CTS signal, but could be reassigned as either GPIO input or output and used for a general purpose. If used in conjunction with the development board, this pin maps to GPIO2.DCD/GPIO1 PORTA0 Allocated Pin 13 on 20 pin header.Used for the serial DCD signal, but could be reassigned as either GPIO input or output and used for a general purpose. If used in conjunction with the development board, this pin maps to GPIO1.NA PORTC7 Reserved NA NAGreen LED PORTC6 Allocated Connected to the green LEDUsed as the Ethernet activity LED, but could be reassigned as a general purpose LED. It must remain a GPIO output for the LED to operate correctly. The LED is lit when the signal is a logic low./INIT PORTC5 Available Pin 20 on 20 pin headerCan be configured for either GPIO input or GPIO outputNA PORTC4 - PORTC0 Reserved NA NADC_ME-HWR.book Page 37 Thursday, July 1, 2004 11:12 AM
LEDs38Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceLEDsGeneral InformationThe embedded modules have two types of LEDs: An LED connected directly to GPIO pins on the processor and controlled directly in softwareAn LED connected to other hardware components (normally the Ethernet hardware) and not directly programmable by the operating systemThe development kit, by default, correctly configures the GPIO connected to the LED (PORTC6) as an output and then uses this LED to represent Ethernet activity. For more information regarding the control of LEDs, see the Net+Works with GNU Tools BSP Porting Guide.About Digi Connect ME LEDsReset Hard ResetThe embedded module supports a hardware reset via pin 14 of the 20-pin header. The unit is forced into a hard reset when this pin is pulled low. When plugged into a development board, this pin is wired to the push button at SW3. As a result, this switch acts as a hard reset button.LED DescriptionYellow This is wired directly to Ethernet hardware and provides an indication of link.GreenThis software programmable LED is wired to processor GPIO register bit PORTC6 and is wired to be lit when low. The default behavior is to blink on Ethernet activity.DC_ME-HWR.book Page 38 Thursday, July 1, 2004 11:12 AM
39Programming ConsiderationsSoft ResetNet+OS provides an internal facility to enact a soft reset, but it is the responsibility of a specific implementation to choose a reasonable trigger to invoke it. One choice is to use a GPIO pin as a signal to trigger a soft reset. The Digi Connect ME has one GPIO pin named "/INIT” (PORTC5) that is not normally assigned to any other task. It is an ideal candidate for a soft reset. The signal is exposed via pin 20 on the 20-pin header, so it can be controlled by an embedded host. When plugged into the development board, the /INIT signal is pulled high, unless a jumper is placed across pins 2 and 3 of jumper block P12. In this way, placing the jumper simulates pressing a soft reset button. The naresetapp example application demonstrates a simple mechanism for monitoring a GPIO pin and then initiating a soft reset when the pin achieves a particular value.Reset CharacteristicsCharacteristic SpecificationDelay 200 milliseconds (typical)Threshold 2.88 VMinimum Hold Time 1 microsecond pulseDC_ME-HWR.book Page 39 Thursday, July 1, 2004 11:12 AM
Flash40Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceFlashGeneral InformationThe Digi Connect ME has 2 MB of flash memory. The Digi Connect Wi-ME has 4 MB of flash memory. In both modules the flash memory is controlled by chip select 0, located at 0x02000000.MemoryThe embedded modules have 8 MB of SDRAM memory, controlled by chip select 1, located at 0x00000000 in the processor address space and aliased at 0x04000000 and 0x08000000. The application program is loaded at address 0x08080000.DC_ME-HWR.book Page 40 Thursday, July 1, 2004 11:12 AM
41Module SpecificationsAPPENDIX ANetwork InterfaceDigi Connect ME Digi Connect Wi-MEStandard: IEEE 802.3Physical Layer: 10/100Base-TData Rate: 10/100Mbps(auto-sensing)Mode: Half-duplex and full-duplex support (auto-sensing)Connector: RJ-45 Standard: IEEE 802.11bFrequency: 2.4 GHz Data Rate: Up to 11 Mbps with automatic fallbackModulation: CCK (11/5 Mbps), DQPSK (2 Mbps), DBPSK (1 Mbps)Transmit Power: 16 dBm typical Receive sensitivity: 1Mbps: -92 dBm2Mbps: -89 dBm5.5Mbps: -87 dBm11Mbps: -82 dBmAntenna Connector: 1 x RP-SMADC_ME-HWR.book Page 41 Thursday, July 1, 2004 11:12 AM
Serial Interface42 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceSerial InterfaceOne TTL serial interface (CMOS 3.3v) with full modem control signals (DTR, DSR, DCD, RTS, CTS).Data Rates (bps)50, 110, 134, 150, 200, 300, 600, 1200, 2400, 3600, 4800, 9600, 19200, 38400, 57600, 115200, 230400Flow Control OptionsRTS/CTS, XON/XOFF, NoneGPIOFive GPIO (General Purpose Input/Output) ports are selectable between modem control and GPIO as follows:RTS/GPIO 4DTR/GPIO 5CTS/GPIO 2DCD/GPIO 1DSR/GPIO 3DC_ME-HWR.book Page 42 Thursday, July 1, 2004 11:12 AM
43Module SpecificationsDC CharacteristicsThe following tables provide DC characteristics for operating conditions, inputs, and outputs.Warning The rise time of your 3.3V power supply needs to be faster than 140ms. That is it needs to be less than 140ms. If the rise time is more than 140ms, it could lead to the 3-1-3 diagnostic error.Operating ConditionsSymbol Description Min Typ Max UnitVCC Supply Voltage 3.14 3.3 3.45 VICC Supply Current — —Digi ConnectEM270mADigiConnectWi-EM400IIL Input Current as “0”(57K pull-up resistor)——57µAIIH Input Current “1”(57K pull-up resistor) -10 — 10 µAIOZ HighZ Leakage Current -10 — 10 µAIOD Output Drive Strength — — 2 mACIO Pin Capacitance (VO=0) —— 4 pFInputsSymbol Description Min Typ Max UnitVIH Input High Voltage 2 — VCC+0.3 VVIL Input Low Voltage VSS-0.3 — 0.2*VCC VDC_ME-HWR.book Page 43 Thursday, July 1, 2004 11:12 AM
Environmental44 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceNote The embedded modules provide an on board supervisor circuit with a 2.88V reset threshold and an internal 5k pull-up resistor. When VCC falls to the threshold voltage, a reset pulse is issued, holding the output in active state. When power rises above 2.88V, the reset remains for approximately 250 ms to allow the system clock and other circuits to stabilize.EnvironmentalOutputsSymbol Description Min Typ Max UnitVOH Output High Voltage 2.4 — 3.45 VVOL Output Low Voltage 0—0.4VDigi Connect ME Digi Connect Wi-MEAmbient Temperature-40oF to 185oF(-40oC to 85oC)-4oF to 185oF (-20oC to 85oC)Storage Temperature -400F to 2570F(-400C to 1250C)Humidty 5% to 90%Altitude 12000 feet(3657.60 meters)DC_ME-HWR.book Page 44 Thursday, July 1, 2004 11:12 AM
45Module SpecificationsMechanicalDimensions Digi ConnectME Digi ConnectWi-MELength 1.445 in.(36.703 mm)1.945 in(49.4 mm)Width 0.75 in.(19.05 mm)Height 0.735 in.(18.669 mm)Device/serialinterface connector 20-pin micro header (10-pin double row) with .50-inch (1.27-mm) pitch (Samtec P/N FTS-110-01-F-DV-TR or similar). Positions 3 through 6 are removed.DC_ME-HWR.book Page 45 Thursday, July 1, 2004 11:12 AM
Dimensions46 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceDimensionsThe following figures show the dimensions of Digi Connect Wi-ME and Digi Connect ME embedded modules.Digi Connect Wi-ME Module FrontDC_ME-HWR.book Page 46 Thursday, July 1, 2004 11:12 AM
47Module SpecificationsBottomDC_ME-HWR.book Page 47 Thursday, July 1, 2004 11:12 AM
Dimensions48 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceSide DC_ME-HWR.book Page 48 Thursday, July 1, 2004 11:12 AM
49Module SpecificationsDigi Connect ME ModuleFront ViewDC_ME-HWR.book Page 49 Thursday, July 1, 2004 11:12 AM
Dimensions50 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceBottomDC_ME-HWR.book Page 50 Thursday, July 1, 2004 11:12 AM
51Module SpecificationsSideRecommended PCB LayoutThe following figure shows the recommended PCB (printed circuit board) layout of the Digi Connect Wi-ME and Digi Connect ME. It is strongly recommended that you consider using the Digi Connect Wi-ME footprint for future flexibility.DC_ME-HWR.book Page 51 Thursday, July 1, 2004 11:12 AM
Recommended PCB Layout52 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceDigi Connect Wi-ME Digi Connect MEDC_ME-HWR.book Page 52 Thursday, July 1, 2004 11:12 AM
53Module SpecificationsAntenna InformationAntenna StrengthThe following diagram demonstrates the strength of the signal received by the whip antenna on both a horizontal and vertical plane. The diagram shows the magnetic field when the antenna is in a vertical position. The outside line represents the horizontal plane and the inside dotted line represents the vertical plane.Radiation PatternsAntenna Description ValuesFrequency GHz 2.4~2.GHzType DipolePower Output 2 WDB Gain 2 dBiVSWR < or = 2.0Dimension 10.0x108.5Weight 10.5gDC_ME-HWR.book Page 53 Thursday, July 1, 2004 11:12 AM
RF Exposure Statement54 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceAntenna Details RF Exposure StatementThe Digi Connect Wi-ME module complies with the RF exposure limits for humans as called out in RSS-102. It is exempt from RF evaluation based on its operating frequency of 2400 MHz, and effective radiated power of 100 milliwatts. This would be less than the 3 watt requirement for a mobile device (>20 cm separation) operating at 2400 MHz.In order to comply with FCC RF exposure limits, dipole antennaantenna should be located at a minimum distance of 7.9 inches (20cm) or more from the body of all persons.Connector RP-SMAAntenna Description ValuesDC_ME-HWR.book Page 54 Thursday, July 1, 2004 11:12 AM
55Module SpecificationsSafety StatementsTo avoid contact with electrical current:Never install electrical wiring during an electrical storm.Never install an ethernet connection in wet locations unless that connector is specifically designed for wet locations.Use caution when installing or modifying ethernet lines.Use a screwdriver and other tools with insulated handles.You and those around you should wear safety glasses or goggles.Do not place ethernet wiring or connections in any conduit, outlet or junction box containing electrical wiring.Installation of inside wire may bring you close to electrical wire, conduit, terminals and other electrical facilities. Extreme caution must be used to avoid electrical shock from such facilities. You must avoid contact with all such facilities.Ethernet wiring must be at least 6 feet from bare power wiring or lightning rods and associated wires, and at least 6 inches from other wire (antenna wires, doorbell wires, wires from transformers to neon signs), steam or hot water pipes, and heating ducts.Do not place an ethernet connection where it would allow a person to use an ethernet device while in a bathtub, shower, swimming pool, or similar hazardous location. Protectors and grounding wire placed by the service provider must not be connected to, removed, or modified by the customer.Do not touch uninsulated ethernet wiring if lightning is likely!Do not touch or move the antenna(s) while the unit is transmitting or receiving. Do not hold any component containing a radio such that the antenna is very close to or touching any exposed parts of the body, especially the face or eyes, while transmitting. Do not operate a portable transmitter near unshielded blasting caps or in an explosive environment unless it is a type especially qualified for such useDC_ME-HWR.book Page 55 Thursday, July 1, 2004 11:12 AM
Safety Statements56 Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceAny external communications wiring you may install needs to be constructed to all relevant electrical codes. In the United States this is the National Electrical Code Article 800. Contact a licensed electrician for details.DC_ME-HWR.book Page 56 Thursday, July 1, 2004 11:12 AMFile No. NC407961, Page A9 of A10File No. NC407961, Page A9 of A10Modular Device End User ResponsibilityIf the FCC ID is not visible when installed inside another device, then the outside of the device into which the module is installedmust also display a label referring to the enclosed module FCCID. This exterior label can use wording such as the following:“This Device Contains Transmitter Module FCC ID: MCQ-50M880”
57CertificationsAPPENDIX BThis product complies with the following standards.FCC Part 15 Class BRadio Frequency Interference (RFI)(FCC 15.105)The Digi Connect ME embedded module has been tested and found to comply with the limits for Class B digital devices pursuant to Part 15 Subpart B, of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential environment. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instruction manual, 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 and correct the interference by one or more of the following measures:Reorient or relocate the receiving antenna.Increase the separation between the equipment and the 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.DC_ME-HWR.book Page 57 Thursday, July 1, 2004 11:12 AM
Industry Canada58Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceLabeling Requirements (FCC 15.19)This device complies with Part 15 of FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.Modifications (FCC 15.21)Changes or modifications to this equipment not expressly approved by Digi may void the user’s authority to operate this equipment.Industry CanadaThis digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications.Le present appareil numerique n’emet pas de bruits radioelectriques depassant les limites applicables aux appareils numeriques de la class B prescrites dans le Reglement sur le brouillage radioelectrique edicte par le ministere des Communications du Canada."DC_ME-HWR.book Page 58 Thursday, July 1, 2004 11:12 AM
59CertificationsDeclaration of Conformity(In accordance with FCC Dockets 96-208 and 95-19)Digi International declares, that the product:to which this declaration relates, meets the requirements specified by the Federal Communications Commission as detailed in the following specifications:Part 15, Subpart B, for Class B EquipmentFCC Docket 96-208 as it applies to Class B personalComputers and PeripheralsThe product listed above has been tested at an External Test Laboratory certified per FCC rules and has been found to meet the FCC, Part 15, Class B, Emission Limits. Documentation is on file and available from the Digi International Homologation Department.Manufacturer’s Name: Digi InternationalCorporate Headquarters: 11001 Bren Road EastMinnetonka MN 55343Manufacturing Headquarters: 10000 West 76th StreetEden Prairie MN 55344Product Name: Digi Connect ME embedded moduleModel Number: 50000866-xxProduct Name: Digi Connect Wi-ME embedded moduleModel Number: 50000880-xxDC_ME-HWR.book Page 59 Thursday, July 1, 2004 11:12 AM
International EMC Standards60Digi Connect Wi-ME & Digi Connect ME Hardware ReferenceInternational EMC StandardsThe Digi Connect ME and Digi Connect Wi-ME embedded modules meet the following electromagnetic emissions standards:EN55022EN55024EN 300 324EN 301 489VCCIAS 3548 RSS 210 (Digi Connect Wi-ME IC: 1846A-50M880) FCC Part 15 Subpart C (Digi Connect Wi-ME FCC ID: MCQ-50M880)Safety StandardsThe Digi Connect ME and Digi Connect Wi-ME embedded modules meet the following safety standards: UL 60950-1CSA 22.2 No. 60950EN60950DC_ME-HWR.book Page 60 Thursday, July 1, 2004 11:12 AM
61Sample Application: TTL Signals to EIA-232APPENDIX CThe following schematic is an example of how to convert the modules’s TTL signals to EIA-232. DC_ME-HWR.book Page 61 Thursday, July 1, 2004 11:12 AM
62Digi Connect EM & Wi-EM Hardware Reference0.1uF12C60.1uF12C40.1uF12C30.1uF21C5+5VGND1110987654321DB9P1RS-232 SERIAL 9-PIN CONNECTORSHIELDSHIELDGNDGND17132524161514122821120362719 1822 2326 275489ADM211EU1RS-232 LINE RECVR 5RX 4TX+5VGND121110987654321SOCKET 2X6DIGI ONE EM CONNECTORP6GND GNDRESET SW ITCH1324SW1DC_ME-HWR.book Page 62 Thursday, July 1, 2004 11:12 AM
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