SIM900B EVB kit User Guide
SIM900B_EVB kit_User Guide_V1.02 32010-11-10
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
