SimCom SIM900B EVB Manuale
Development Kit Manual
SIM900B-EVB_UGD_V1.01
SIM900B EVB User Guide
SIM900B-EVB_UGD_V1.01 2 14.04.2010
Document Title: SIM900B EVB User Guide
Version: 1.01
Date: 2010-04-14
Status: Release
Document Control ID: SIM900B-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. 2010
SIM900B EVB User Guide
SIM900B-EVB_UGD_V1.01 3 14.04.2010
Contents
Contents ............................................................................................................................................3
1. SIM900B 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. Test Interface...............................................................................................................................13
4.1 Serial Interface ..................................................................................................................14
4.2 J2---KEY & CTRL............................................................................................................15
4.3 J3---LCD & I/O.................................................................................................................16
5. EVB and accessory equipment....................................................................................................17
6. Illustration:..................................................................................................................................18
6.1 Running:............................................................................................................................18
6.2 Connecting Net and calling...............................................................................................18
6.3 Downloading .....................................................................................................................18
6.4 Turns off............................................................................................................................18
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：ANTENNA INTERFACE ............................................................................................... 11
FIGURE 8：SERIAL PORT AND DEBUG PORT .............................................................................12
FIGURE 9：STATUSLED...................................................................................................................13
FIGURE 10：TEST INTERFACE OVERVIEW.................................................................................13
FIGURE 11：J1 INTERFACE.............................................................................................................14
FIGURE 12：J2 INTERFACE.............................................................................................................15
FIGURE 13：J3 INTERFACE.............................................................................................................16
FIGURE 14：EVB AND ACCESSORY EQUIPMENT...................................................................... 17
SIM900B EVB User Guide
SIM900B-EVB_UGD_V1.01 4 14.04.2010
SCOPE
This document give the usage of SIM900B EVB, user can get useful info about the SIM900B
EVB quickly through this document.
This document is subject to change without notice at any time.
SIM900B EVB User Guide
1. SIM900B EVB
Figure 1：EVB TOP view
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SIM900B EVB User Guide
Figure 2：EVB BOTTOM view
A: SIM900B module interface
B: SIM card interface
C: headset interface
D: Download switch, turn on or 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 transmiting, data exchanging
J: DEBUG serial port
K: hole for fixing the antenna
L: source adapter interface
M: light
N: hole for fixing the SIM900B
O: headphones interface
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SIM900B EVB User Guide
2. EVB accessory
Figure 3：EVB accessory
A: 5V DC source adapter
B: headset
C: antenna
D: antenna transmit cable
E: serial port cable
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SIM900B EVB 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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SIM900B EVB User Guide
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 speak output
3 SPK1N O Negative speak output
4 MIC1N I Negative microphone input
Earphone interface:
Pin Signal Input/Output Description
5 MIC2P&SPK2P I/O Auxiliary positive input and output
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3.3 SIM card interface
Figure 6：SIM card interface
SIM900B-EVB_UGD_V1.01 10 14.04.2010
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