User's Manual

SIM548C EVB User Guide
SIM548C-EVB_ UGD _V1.01 04.05.2008
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6 Illustration
6.1 GSM part
6.1.1 Running
(1) Connect the SIM548C module to the 60pins connector on the SIM548C EVB, insert the 5V
direct current source adapter, switch shifter S101 on the RUN state, shifter S102 on the ON
state;
(2) Press the GSM_ON/OFF button Z101 for about 2 seconds , then the GSM part of SIM548C
begins to run.
You will see the light GSM_NET on the EVB glittering at a certain frequency corresponding to
various states, then you can judge whether the EVB and SIM548C is running or not. No function
and test can be executed when we have not connected necessary accessories.
6.1.2 Connecting Net and calling
(1) Connect the serial port line to the GSM_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 the correct
baud rate and COM number. The default baud rate of SIM548C is 115200 bps, and the COM
number based on which port your serial port line insert in, you should select such as COM1，
COM3 or COMx etc.
(2) Connect the GSM antenna to the SIM548C module using an antenna transmit line, insert SIM
card into the SIM card interface, insert headphone or handset 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 SIM548C module will execute its
corresponding function.
6.1.3 Downloading
Connect the serial port line to the GSM_MAIN serial port, connect the direct current source
adapter, run the download program and press the START key, then switch shifter S102 on the ON
state, shifter S101 on the D/L state, then the download procedure is executing
6.1.4 Turn off
Press the GSM_ON/OFF button Z101 for about 1 second, the GSM part of SIM548C will be