SimCom SIM900B EVB User manual

SIM900B _EVB Kit_User
Guide_V1.02

SIM900B EVB kit User Guide
SIM900B_EVB kit_User Guide_V1.02 22010-11-10
Document Title: SIM900B EVB kit User Guide
Version: 1.02
Date: 2010-11-10
Status: Release
Document Control ID: SIM900B_EVB kit_User Guide_V1.02
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. 2010

SIM900B EVB kit User Guide
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Contents
1 SIM900B EVB..........................................................................................................................8
2 EVB Accessory .......................................................................................................................10
3 Accessory Interface................................................................................................................. 11
3.1 Power Interface ...........................................................................................................11
3.2 Audio Interface............................................................................................................11
3.3 SIM Card Interface......................................................................................................12
3.4 Antenna Interface........................................................................................................13
3.5 Main Interface and Debug Interface............................................................................14
3.6 Operating Status LED .................................................................................................15
4 Test Interface...........................................................................................................................16
4.1 J1---RS232 ..................................................................................................................16
4.2 J2---KEY & CTRL......................................................................................................17
4.3 J3---LCD & I/O...........................................................................................................18
5 EVB and Accessory Equipment..............................................................................................19
6 Illustration...............................................................................................................................20
6.1 Running:......................................................................................................................20
6.2 Connecting Net and Calling ........................................................................................20
6.3 Downloading...............................................................................................................20
6.4 Turns off ......................................................................................................................20

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Table Index
TABLE 1: EVB DESCRIPTION..............................................................................................................9
TABLE 2: EVB ACCESSORY ..............................................................................................................10
TABLE 3: POWER INTERFACE .......................................................................................................... 11
TABLE 4: HEADSET INTERFACE...................................................................................................... 11
TABLE 5: HANDSET INTERFACE .....................................................................................................12
TABLE 6: MAIN INTERFACE .............................................................................................................14
TABLE 7: DEBUG INTERFACE ..........................................................................................................14
TABLE 8: WORKING STATE OF STATUS LED................................................................................. 15
TABLE 9: RS232 PIN LIST...................................................................................................................16
TABLE 10: KEY & CTRL PIN LIST.....................................................................................................17
TABLE 11: LCD & I/O INTERFACE PIN LIST...................................................................................18

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Figure Index
FIGURE 1:EVB TOP VIEW ....................................................................................................................8
FIGURE 2:EVB BOTTOM VIEW...........................................................................................................9
FIGURE 3: EVB ACCESSORY............................................................................................................. 10
FIGURE 4: POWER INTERFACE ........................................................................................................ 11
FIGURE 5: AUDIO INTERFACE ......................................................................................................... 11
FIGURE 6: SIM CARD INTERFACE...................................................................................................12
FIGURE 7: ANTENNA INTERFACE ...................................................................................................13
FIGURE 8: MAIN INTERFACE AND DEBUG INTERFACE.............................................................14
FIGURE 9: STATUS LED......................................................................................................................15
FIGURE 10: TEST INTERFACE OVERVIEW.....................................................................................16
FIGURE 11: J1 INTERFACE.................................................................................................................16
FIGURE 12: J2 INTERFACE ................................................................................................................17
FIGURE 13: J3 INTERFACE ................................................................................................................18
FIGURE 14: EVB AND ACCESSORY EQUIPMENT .........................................................................19

SIM900B EVB kit User Guide
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Version History
Date Version Description of change Author
2010-04-14 1.01 Origin Huangqiuju
2010-11-01 1.02 Add SIM900S\SIM940S\CMCC900 moduls Sunshengwu

SIM900B EVB kit User Guide
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SCOPE
This document give the usage of SIM900B EVB, user can get useful inforamtion about the
SIM900B EVB quickly through this document.
The SIM900B EVB can be used to evaluate following SIMCom modules:
zSIM900B
zSIM900S\SIM940S
zCMCC900
This document is subject to change without notice at any time.

SIM900B EVB kit User Guide
1SIM900B EVB
Figure 1:EVB top view
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SIM900B EVB kit User Guide
Figure 2:EVB bottom view
Table 1: EVB description
Part Description
A Interface connecting to SIM900B\SIM900S\CMCC900 module
B SIM card interface
C Headset interface
D Download switch, turn on or turn off download function
E VBAT switch, switch the voltage source from the adaptor or external battery
F PWRKEY key, turn on or turn off SIM900B
G Buzzer
H Expand port, such as keypad port, main and debug serial port, display port
I Main serial port for downloading, AT command transmitting, data exchanging
J Debug serial port
K Hole for fixing the antenna
L DC adapter interface
M Light
N Holes for fixing the SIM900B\SIM900S\CMCC900
O Handset interface
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SIM900B EVB kit User Guide
2EVB Accessory
Figure 3: EVB accessory
Table 2: EVB accessory
Part Description
A 5V DC adapter
B Headset
C Antenna transmit cable
D Antenna
E Serial port cable
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SIM900B EVB kit User Guide
3Accessory Interface
3.1 Power Interface
Figure 4: Power interface
Table 3: Power interface
Pin Signal I/O Description
1 Adapter input I 5V/2.5A DC source input
3.2 Audio Interface
Figure 5: Audio interface
Table 4: Headset interface
Pin Signal I/O Description
5 MIC2P&SPK2P I/O Auxiliary positive input and output
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SIM900B EVB kit User Guide
Table 5: Handset interface
Pin Signal I/O Description
1 MIC1P I Positive microphone input
2 SPK1P O Positive speak output
3 SPK1N O Negative speak output
4 MIC1N I Negative microphone input
3.3 SIM Card Interface
Figure 6: SIM card interface
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SIM900B EVB kit User Guide
3.4 Antenna Interface
Figure 7: Antenna interface
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SIM900B EVB kit User Guide
3.5 Main Interface and Debug Interface
Figure 8: Main interface and debug interface
Table 6: Main interface
Pin Signal I/O Description
1 DCD OData carrier detection
2 TXD OTransmit data
3 RXD IReceive data
4 DTR IData Terminal Ready
5 GND GND
7 RTS IRequest to Send
8 CTS OClear to Send
9 RI O Ring Indicator
Table 7: Debug interface
Pin Signal I/O Description
2 DBG_TXD OTransmit data
3 DBG_RXD IReceive data
5 GND GND
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SIM900B EVB kit User Guide
3.6 Operating Status LED
Figure 9: Status LED
Table 8: Working state of status LED
State Module function
Off Module is not running
64ms On/ 800ms Off Module does not find the network
64ms On/ 3000ms Off Module find the network
64ms On/ 300ms Off GPRS communication
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4Test Interface
Figure 10: Test interface overview
4.1 J1---RS232
Figure 11: J1 interface
Table 9: RS232 pin list
Pin Signal I/O Description
1 TXD OTransmit data
2 RXD IReceive data
3 DCD OData carrier detection
4 RI O Ring Indicator
5 CTS OClear to Send
6 GND GND
7 DTR IData Terminal Ready
8 DBG_RXD I Receive data
9 RTS IRequest to Send
10 DBG_TXD O Transmit data
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SIM900B EVB kit User Guide
4.2 J2---KEY & CTRL
Figure 12: J2 interface
Table 10: KEY & CTRL pin list
Pin Signal I/O Description
1 KBC0 O
2 KBR0 I
3 KBC1 O
4 KBR1 I
5 KBC2 O
6 KBR2 I
7 KBC3 O
8 KBR3 I
9 KBC4 O
10 KBR4 I
Keypad array interface
11 NC
12 PWRKEY I Power on key
13 GND GND
14 VBAT I VBAT
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SIM900B EVB kit User Guide
4.3 J3---LCD & I/O
Figure 13: J3 interface
Table 11: LCD & I/O interface pin list
Pin Signal I/O Description
1 DISP_DATA I/O Display data line
2 DISP_D/C ODisplay data or address select
3 DISP_CLK ODisplay clock output
4 DISP_RST O Display reset outplay
5 DISP_CS ODisplay enable output
6 ADC0 IADC input
7 GPIO0 I/O GPIO5 reserved for user
8 BUZZER I/O Buzzer reserved for user
9 SIM_PRESENCE I SIM card detection
10 NC
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SIM900B EVB kit User Guide
5EVB and Accessory Equipment
At normal circumstance, the EVB and its accessory are equipped as shown in the following figure.
Figure 14: EVB and accessory equipment
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SIM900B EVB kit User Guide
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6Illustration
6.1 Running:
1) Connect the module to SIM900B EVB via the X101(60pins connector), inserting 5V DC
adapter to X201 connector, switch S1 to OFF state and S2 to ON state.
2) Press the PWRKEY for about 1 second, and then the module begins running.
The light on the EVB will flash at a certain frequency to indicate different working status, and
please refer to the module’s Hardware Document for details. Function test can not be executed
without the necessary accessories.
6.2 Connecting Net and Calling
1) Connect the serial port cable to X401 connector (MAIN serial port); open the HyperTerminal
(AT command windows), the location of the HyperTerminal in Microsoft Windows2000\
WindowsXP is Start→Accessory→Communication→HyperTerminal.
2) Set correct Baud Rate and COM number. The default setting of module's serial port is
autobauding,and autobauding supports baud rates as following:1200, 2400, 4800, 9600,
19200, 38400, and 57600bps. Please set HyperTerminal band rate as one of the above to
make sure communicating successfully at the first time.
3) Connect the antenna and module via an antenna transmit line, insert SIM card into the SIM
card interface, and then insert handset into X301 connector or headset into X302 connector.
4) Follow the step of running as mentioned above to power on the system, send the AT
commands to the module through the HyperTerminal, and then the module will perform
corresponding functions.
6.3 Downloading
Connect the serial port cable to X402 connector (debug port) and 5V DC adapter to X201
connector. After running the download program, switch S1 to ON state and then switch S2 to ON
state as well, then the downloading procedure will be executed.
6.4 Turns off
Press the PWRKEY for about 1 second, SIM900B module will be turned off.
Note:
The SIM900B EVB is almost the same with the SIM300 EVB. The difference between the two
EVBs are as following:
● Board to board connector: on SIM900B EVB, the connector is SUNCAGEY’s
BB530-06001-20R; on SIM300 EVB, the connector is ENTERY Company’s
1008-G60N-01R or JXT’s 210-106001-001.
● R411: on SIM900B EVB, R411 is 15k ohm; on SIM300 EVB, R411 is 0 ohm.