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Development Kit Manual
SIM900-EVB_UGD_V1.01
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SIM900 EVB User Guide
SIM900-EVB_UGD_V1.01 2 08.12.2009
Document Title:
SIM900 EVB User Guide
Version:
1.01
Date:
2009-12-8
Status:
Release
Document Control ID:
SIM900-EVB_UGD_V1.01
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. 2009
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Contents
Contents ............................................................................................................................................3
Version History .................................................................................................................................3
1. SIM900 EVB.................................................................................................................................5
2. EVB accessory..............................................................................................................................7
3. Accessory Interface.......................................................................................................................8
3.1 Power Interface ...................................................................................................................8
3.2 Audio Interface....................................................................................................................9
3.3 SIM card interface.............................................................................................................10
3.4 Antenna Interface ..............................................................................................................11
3.5 RS232 Interface.................................................................................................................12
3.6 Operating Status LED.......................................................................................................13
4. T est Interface...............................................................................................................................14
4.1 J103...................................................................................................................................14
4.2 J201...................................................................................................................................15
4.3 J104...................................................................................................................................16
5. EVB and accessory equipment.................................................................................................... 18
6. Illustration:..................................................................................................................................19
6.1 Running:............................................................................................................................19
6.2 Connecting Net and calling...............................................................................................19
6.3 Downloading.....................................................................................................................19
6.4 Turns off............................................................................................................................19
Figure Index
FIGURE 1: EVB TOP VIEW...................................................................................................................5
FIGURE 2: EVB BOTTOM VIEW..........................................................................................................6
FIGURE 3: EVB ACCESSORY...............................................................................................................7
FIGURE 4: POWER INTERFACE..........................................................................................................8
FIGURE 5: AUDIO INTERFACE...........................................................................................................9
FIGURE 6: SIM CARD INTERFACE...................................................................................................10
FIGURE 7: ANTENN A INTERFACE ...................................................................................................11
FIGURE 8: SERIAL PORTS..................................................................................................................12
FIGURE 9: STATUSLED ......................................................................................................................13
FIGURE 10: TEST INTERFACE OVERVIEW.....................................................................................14
FIGURE 11: J103 INTERFACE.............................................................................................................14
FIGURE 12: J201 INTERFACE ............................................................................................................15
FIGURE 13: J104 INTERFACE ............................................................................................................16
FIGURE 14: EVB AND ACCESSORY EQUIPMENT .........................................................................18
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Version History
Data Version Description of change Author
2009-12-08 1.01 Origin Lee
SCOPE
This device complies with part 15 of the 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. (for FCC)
Operation is subject to the following two conditions: (1) this device may not cause interference,
and (2) this device must accept any interference, including interference that may cause undesired
operation of the device. (FOR IC)
This document gives the usage of SIM900 EVB and SIM900A EVB, user can get useful info
about the SIM900 EVB and SIM900A EVB quickly through this document.
This document takes SIM900 EVB as an example.
This document is subject to change without notice at any time.
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1. SIM900 EVB
Figure 1: EVB TOP view
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Figure 2: EVB BOTTOM view
A: Source adapter interface
B: MAIN serial port for downloading, AT command transmitting, data exchanging
C: DEBUG serial port
D: SIM card interface
E: Test point interface
F: Antenna fix hole
G: SIM900-TE with SIM900 module interface
H: Module fix hole
I: Reset key ( reset the module )
J: Power key ( module ON/OFF control )
K: Charge switch ( charge ON/OFF control )
L: Download switch ( download control )
M: Power switch ( power ON/OFF control )
N: Headphones interface
O: Headset interface
P: Line in interface
Q: Status light
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2. EVB accessory
Figure 3: EVB accessory
A: antenna
B: antenna transmit line
C: 5V DC source adapter
D: serial port line
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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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3.2 Audio Interface
Figure 5: Audio Interface
Headset interface:
Pin Signal I/O Description
1 MIC1P I Positive microphone input
2 SPK1P O Positive receiver output
3 MIC1N I Negative microphone input
4 SPK1N O Negative receiver output
Earphone interface:
Pin Signal Input/Output Description
5 MIC2P&SPK2P I/O Auxiliary positive input and output
Line in interface:
Pin Signal Input/Output Description
6 Line in R/L I/O Line in signal
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3.3 SIM card interface
Figure 6: SIM card interface
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3.4 Antenna Interface
Figure 7: Antenna Interface
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3.5 RS232 Interface
Figure 8: Serial Ports
Serial Port 1——MAIN Interface
Serial Port 2——DEGUG Interface
Main Interface:
Pin Signal I/O Description
1 DCD O Data carrier detection
2 TXD O Transmit data
3 RXD I Receive data
4 DTR I Data T erm inal Ready
5 GND GND
7 RTS I Request to Send
8 CTS O Clear to Send
9 RI O Ring Indicator
Debug Interface:
Pin Signal I/O Description
2 DEBUG_TX O Transmit data
3 DEBUG_RX I Receive data
5 GND GND
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3.6 Operating Status LED
Figure 9: StatusLED
Working state of status LED as list:
Name Description STATUS
Q1 VBAT ON/OFF indicator
Bright：VBAT ON;
Extinct: VBAT OFF
Q2 GSM part status indicator
Bright: Module runs normally
Extinct: System is powered down or module runs
unconventionally
Q3 GSM_NET status indicator
Blinking at a certain frequency according various GSM net status
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4. Test Interface
Figure 10: Test interface overview
4.1 J103
Figure 11: J103 Interface
J103 Interface Pin List:
Pin Signal I/O Description
1 DISP_D/C O Display data or address select
2 DISP_CS O Display select output
3 DISP_CLK O Display clock output
4 DISP_DAT I/O Display data line
5 GPO1 O GPO
6 ADC I ADC IN
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7 GPIO1 I/O GPIO
8 TEMP_BAT I ADC input
9 SIMPRESENCE I SIM detect input
10 PWM1 O PWM output
11 SDA I/O I2C BUS DATA
12 SCL O I2C BUS CLOCK
13 GND POWER GND
14 PWM2 O PWM output
4.2 J201
Figure 12: J201 Interface
J201 Interface Pin List:
Pin
Signal I/O
Description
1 TXD O Transmit data
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2 RXD I Receive data
3 DCD O Data carrier detection
4 RI O Ring Indicator
5 CTS O Clear to Send
6 GND GND
7 DTR I Data T erm inal Ready
8 DEBUG_RX I Receive data
9 RTS I Request to Send
10 DEBUG_TX O Transmit data
4.3 J104
Figure 13: J104 Interface
J104 Interface Pin List:
Pin Signal I/O Description
1 KCOL0
2 KROW0 I
3 KCOL1
4 KROW1
5 KCOL2
6 KROW2
Keypad array interface
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7 KCOL3
8 KROW3
9 KCOL4
10 KROW4
11 PWRKEY_OUT O POWER KEY OUT
12 PWRKEY I POWER KEY IN
13 GND POWER GND
14 VBAT POWER POWER
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5. EVB and accessory equipment
At normal circumstance, the EVB and its accessory are equipped as the Figure 14
Figure 14: EVB and accessory equipment
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6. Illustration:
6.1 Running:
(1) Connect the SIM900-TE with SIM900 module to the 60pins connector on SIM900 EVB,
inserting 5V direct current source adapter, switching the S101,S102 switch on off state,
S105 switch on ON state;
(2) Press the PWRKEY for about 1 second, and then SIM900 module begins running.
You can see the light Q3 on the EVB flashing at a certain frequency. By the state, you can
judge whether the EVB and SIM900 can run or not. No function and test can be executed
when we have not connected necessary accessories.
6.2 Connecting Net and calling
(1) connect the serial port line to the MAIN serial port, open the HyperTerminal(AT
command windows) on your Personal computer, the location of the HyperTerminal in
windows2000 is START→ accessory→ communication→ HyperTerminal. Set correct
Baud Rate and COM number. The Baud Rate of SIM900 is 115200, and the COM
number based on which USB port your serial port line insert in, you should select such
as COM3 or COM4 etc.
(2) Connect the antenna to the SIM900-TE with SIM900 module using an antenna transmit
line, insert SIM card into th e SIM card interface, insert headphone s or headset into its
interface.
(3) Act on the step of
running which mentioned above, power on the system, typing the
AT command in the HyperTerminal, and then the SIM900 module will execute its
corresponding function.
6.3 Downloading
Connect the serial port line to the MAIN serial port, connect the direct current source
adapter, run the download program and press the START key, then switch the S105 switch on ON
state, S102 switch on ON state, then EVB provide the function of downloading.
6.4 Turns off
Turn off SIM900 module: press the PWRKEY for about 2 second, SIM900 module will be
turned off.
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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 3235 3300
Fax: +86 21 3235 3301
URL: www.sim.com/wm
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