SimCom SIM908 Manual
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SimCom SIM908 Manual

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Development Kit Manual
SIM908 EVB kit_User Guide_V1.00

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Summary of Contents for SimCom SIM908

  • Page 1 Development Kit Manual SIM908 EVB kit_User Guide_V1.00...
  • Page 2 Document Control ID: General Notes SIMCom offers this information as a service to its customers, to support application and engineering efforts that use the products designed by SIMCom. The information provided is based upon requirements specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search for additional relevant information, including any information that may be in the customer’s possession.

  • Page 3: Table Of Contents

    SIM908 EVB kit User Guide Contents Contents ............................3 Version History ..........................5 1 Overview............................6 2 EVB accessory ..........................8 3 Accessory interface ........................9 3.1 Power interface........................9 3.2 Audio interface ........................10 3.3 SIM card interface......................11 3.4 Antenna interface .......................12 3.4.1 GSM antenna interface .....................12 3.4.2 GPS antenna interface ....................13...
  • Page 4 SIM908 EVB kit User Guide Figure Index FIGURE 1: TOP VIEW ..........................6 FIGURE 2: BOTTOM VIEW ........................6 FIGURE 3: EVB ACCESSORY.......................8 FIGURE 4: POWER INTERFACE ......................9 FIGURE 5: AUDIO INTERFACE ......................10 FIGURE 6: SIM CARD INTERFACE....................11 FIGURE 7: GSM ANTENNA INTERFACE..................12 FIGURE 8: GPS ANTENNA INTERFACE...................13...

  • Page 5: Version History

    Ma Honggang SCOPE This document give the usage of SIM908 EVB, user can get useful info about the SIM908 EVB quickly through this document. Using SIM908 EVB, user can demo SIM908 module. This document is subject to change without notice at any time.

  • Page 6: Overview

    SIM908 EVB kit User Guide 1 Overview Figure 1: TOP view Figure 2: BOTTOM view A: 60-pin connector, SIM908 module interface B1-B5: LED indicator B1: VBAT ON/OFF SIM908_EVB kit_ User Guide _V1.00 2011.8.15...
  • Page 7 SIM908 EVB kit User Guide B2: GSM net status B3: The GSM part of the module ON/OFF status B5: DBG RXD/TXD STATUS C1-C9: Key control for various functions C1: GSM part power-up / power down control (button Z101) C2: VBAT ON/OFF control (shifter S102)

  • Page 8: Evb Accessory

    SIM908 EVB kit User Guide 2 EVB accessory Figure 3: EVB accessory A: 5V DC source adapter B: GSM antenna C: GPS antenna D: RF cable E: Earphone F: Two USB to serial port lines SIM908_EVB kit_ User Guide _V1.00...

  • Page 9: Accessory Interface

    SIM908 EVB kit User Guide 3 Accessory interface 3.1 Power interface Figure 4: Power interface Signal Description Adapter input 5V/2.5A DC source input SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 10: Audio Interface

    SIM908 EVB kit User Guide 3.2 Audio interface Figure 5: Audio interface Headset interface Signal Description MIC1N Negative microphone input SPK1N Negative microphone input SPK1P Positive microphone input MIC1P Positive microphone input Headphone interface: Signal Input/Output Description MIC2P&SPK2P Auxiliary positive input and output SIM908_EVB kit_ User Guide _V1.00...

  • Page 11: Sim Card Interface

    SIM908 EVB kit User Guide 3.3 SIM card interface Figure 6: SIM card interface Note: Please refer to SIM908 Hardware design, detailed in Chapter 4.8 SIM Card interface. SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 12: Antenna Interface

    SIM908 EVB kit User Guide 3.4 Antenna interface 3.4.1 GSM antenna interface Figure 7: GSM antenna interface SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 13: Gps Antenna Interface

    SIM908 EVB kit User Guide 3.4.2 GPS antenna interface Figure 8: GPS antenna interface SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 14: Rs232 Interface

    SIM908 EVB kit User Guide 3.5 RS232 interface Figure 9: GSM part serial ports Serial Port 1 Signal Description Data carrier detection Transmit data Receive data Data Terminal Ready Request to Send Clear to Send Ring Indicator Serial Port 2...

  • Page 15: Operating Status Led

    SIM908 EVB kit User Guide 3.6 Operating status LED 3.6.1 GSM part Figure 10: GSM part LED Name Description STATUS Bright: VBAT ON; VBAT_LED VBAT ON/OFF indicator Extinct: VBAT OFF Blinking certain frequency GSM_NET_LED GSM_NET status indicator according to various GSM net status...

  • Page 16: Debug Indicator

    SIM908 EVB kit User Guide 3.6.2 Debug indicator Figure 11: Debug port LED Name Description STATUS Run normally: Blinking at 1Hz Debug_RXD/TXD_LED Run or download indicator Download: Blinking rapidly 4 Test interface Figure 12: Test interface overview SIM908_EVB kit_ User Guide _V1.00...

  • Page 17: Gsm Serial Ports

    SIM908 EVB kit User Guide 4.1 GSM serial ports Figure 13: GSM serial ports Signal Description Transmit data Receive data Data carrier detection Ring Indicator Clear to Send Data Terminal Ready DEBUG_RX Receive data Request to Send DEBUG_TX Transmit data SIM908_EVB kit_ User Guide _V1.00...

  • Page 18: Lcd & Adc

    SIM908 EVB kit User Guide 4.2 LCD & ADC Figure 14: LCD & ADC interface Signal Description DISP_CS Display enable output GPIO0 GPIO port DISP_CLK Display clock output BUZZER Buzzer output. DISP_DATA Display data line ADC0 Adc input DISP_D/C Display data or address select...

  • Page 19: Gps Serial Ports And Power

    SIM908 EVB kit User Guide 4.3 GPS serial ports and power Figure 15: GPS serial port Signal Description GPS_VCC_RF Power supply for 3V active antenna. External DC power supply for an active GPS_VANT antenna. SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 20: Evb And Accessory Equipment

    SIM908 EVB kit User Guide 5 EVB and accessory equipment At normal circumstance, the EVB and its accessory are equipped as the following figure: Figure 16: EVB and accessory equipment SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 21: Illustration

    Note: You will see the light GSM_NET on the EVB glittering at a certain frequency corresponding to various states, then you can judge whether the EVB and SIM908 is running or not. No function and test can be executed when we have not connected necessary accessories.
  • Page 22 Figure 18: name Hyper Terminal (2) Set the correct baud rate and COM number. The default baud rate of SIM908 is 57600 bps, and the COM number based on which port your serial port line insert in, conform it in the device manager, customers should select such as COM1，COM3 or COMx etc.
  • Page 23 SIM908 EVB kit User Guide (3)Choose the correct port number: Figure 20: select port number (4)Set baud rate（default is 57600, no flow control）: Figure 21: set baud rate SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 24: Downloading

    SIM908 EVB kit User Guide (5) Typing the AT commands in the HyperTerminal, and then the SIM908 module will execute its corresponding function. For detail AT commands related with GSM part please refer to SIM908_AT Command Manual_V1.01. 6.1.3 Downloading SIM908 module shares the same flash loader with SIM900 which is a similar product also from SIMCom.

  • Page 25: Turn Off

    Connect the SIM908 module to the 60pin connector interface and the external battery to charging interface, which have been provided on the EVB. Insert the direct current source adapter; switch shifter S102 on the OFF state, shifter S105 on the ON state, then the SIM908 will go to the charging state.
  • Page 26 SIM908 EVB kit User Guide Figure 23: setting GPS tool (4) Click to run, and if the $GPGGA/$GPGSA NMEA sentences appear in Monitor View, the SIM908 is acquiring the GPS signal. Figure 24: power on GPS SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 27: Position Fixed

    Notes:There are two types of GPS antenna: One is active antenna, if the customer uses the active GPS antenna in the SIM908-EVB kit to demo GPS, for providing the power to the active GPS antenna, it is necessary to connect GPS_VANT with GPS_RF_VCC, the picture as below: The other is passive antenna, if customers want to use passive GPS antenna to demo GPS, there is no need to provide power to the antenna.

  • Page 28: Ttff Test

    SIM908 EVB kit User Guide Figure 26: Position fixed 6.2.3 TTFF Test SIMCom NMEA DEMO TOOL supports SIM908 TTFF test. The TTFF information is shown in the following figure: Figure 27: TTFF test SIM908_EVB kit_ User Guide _V1.00 2011.8.15...

  • Page 29: Turn Off And Reset

    SIM908 EVB kit User Guide 6.2.4 Turn off and Reset (1) Turn off: SIMCom NMEA DEMO TOOL supports AT Command input at the running state, customers can turn off the GPS module by type in “AT+CGPSPWR=0”, and click the button to execute.
  • Page 30 Contact us: Shanghai SIMCom Wireless Solutions Ltd. Add: SIM Technology Building，No.633，Jinzhong Road，Changning District， Shanghai P.R. China 200335 Tel: +86 21 3252 3300 Fax: +86 21 3252 3301 URL: www.sim.com/wm/...

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