SimCom SIM908 User manual
Development Kit Manual
SIM908 EVB kit_User Guide_V1.00
SIM908 EVB kit User Guide
Document Title: SIM908 EVB kit User Guide
Version: 1.00
Date: 2011-08-15
Status: Release
Document Control ID: SIM900_EVB kit_User Guide_V1.00
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. Furthermore, system validation of this
product designed by SIMCom within a larger electronic system remains the responsibility of
the customer or the customer’s system integrator. All specifications supplied herein are
subject to change.
Copyright
This document contains proprietary technical information which is the property of SIMCom
Limited., copying of this document and giving it to others and the using or communication of
the contents thereof, are forbidden without express authority. Offenders are liable to the
payment of damages. All rights reserved in the event of grant of a patent or the registration of
a utility model or design. All specification supplied herein are subject to change without
notice at any time.
Copyright © Shanghai SIMCom Wireless Solutions Ltd.2011
SIM908_EVB kit_ User Guide _V1.00 2011.8.15
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SIM908 EVB kit User Guide
Contents
Contents ............................................................................................................................................3
Ver si on Hi st or y .................................................................................................................................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
3.5 RS232 interface..................................................................................................................14
3.6 Operating status LED.........................................................................................................15
3.6.1 GSM part ..................................................................................................................15
3.6.2 Debug indicator ........................................................................................................16
4 Test interface ................................................................................................................................16
4.1 GSM serial ports ................................................................................................................17
4.2 LCD & ADC ......................................................................................................................18
4.3 GPS serial ports and power ................................................................................................19
5 EVB and accessory equipment.....................................................................................................20
6 Illustration....................................................................................................................................21
6.1 GSM part............................................................................................................................21
6.1.1 Running ....................................................................................................................21
6.1.2 Connecting Net and calling ......................................................................................21
6.1.3 Downloading ............................................................................................................24
6.1.4 Turn off.....................................................................................................................25
6.1.5 Charging ...................................................................................................................25
6.2 GPS part .............................................................................................................................25
6.2.1 Running: ...................................................................................................................25
6.2.2 Position fixed............................................................................................................27
6.2.3 TTFF Test .................................................................................................................28
6.2.4 Turn off and Reset ....................................................................................................29
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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
FIGURE 9: GSM PART SERIAL PORTS..............................................................................................14
FIGURE 10: GSM PART LED...............................................................................................................15
FIGURE 11: DEBUG PORT LED .........................................................................................................16
FIGURE 12: TEST INTERFACE OVERVIEW.....................................................................................16
FIGURE 13: GSM SERIAL PORTS......................................................................................................17
FIGURE 14: LCD & ADC INTERFACE...............................................................................................18
FIGURE 15: GPS SERIAL PORT .........................................................................................................19
FIGURE 16: EVB AND ACCESSORY EQUIPMENT .........................................................................20
FIGURE 17: OPEN HYPER TERMINAL.............................................................................................21
FIGURE 18: NAME HYPER TERMINAL ...........................................................................................22
FIGURE 19: CONFIRM PORT NUMBER............................................................................................22
FIGURE 20: SELECT PORT NUMBER ...............................................................................................23
FIGURE 21: SET BAUD RATE ............................................................................................................23
FIGURE 22: SIM908 FLASH LOADER...............................................................................................24
FIGURE 23: SETTING GPS TOOL ......................................................................................................26
FIGURE 24: POWER ON GPS..............................................................................................................26
FIGURE 25: GPS_VANT AND GPS_RF_VCC ....................................................................................27
FIGURE 26: POSITION FIXED............................................................................................................28
FIGURE 27: TTFF TEST.......................................................................................................................28
FIGURE 28: POWER OFF GPS PART .................................................................................................29
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SIM908 EVB kit User Guide
Version History
Data Version Description of change Author
2011-8-15 1.00 Origin 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.
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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
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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)
C3: VCHG ON/OFF control (shifter S105)
C4: GSM part program download control (shifter S101)
C7: debug port RXD/TXD LED status selective shifter (shifter S106)
D: Power source adapter interface
E1-E3: Audio interface
E1: Handset interface
E2: Headphone interface
E3: Buzzer
F1-F2: Serial ports
F1: Main serial port for downloading, AT command transmitting, data exchanging
F2: Debug serial port default for GPS NMEA information output
G1-G2: Hole for antenna fixed
G1: Hole for GSM antenna fixed
G2: Hole for GPS antenna fixed
H: Expand port, such as serial ports, display port
L1-L4: Hole for EVB board fixed
K: SIM card connector
L: 3.3V Back-up battery for GSM part
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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
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SIM908 EVB kit User Guide
3 Accessory interface
3.1 Power interface
Figure 4: Power interface
Pin Signal I/O Description
1 Adapter input I 5V/2.5A DC source input
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SIM908 EVB kit User Guide
3.2 Audio interface
Figure 5:Audio interface
Headset interface
Pin Signal I/O Description
1 MIC1N I Negative microphone input
2 SPK1N O Negative microphone input
3 SPK1P O Positive microphone input
4 MIC1P I Positive microphone input
Headphone interface:
Pin Signal Input/Output Description
5 MIC2P&SPK2P I/O Auxiliary positive input and output
SIM908_EVB kit_ User Guide _V1.00 2011.8.15
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