
SIMCOM_EVB Kit_User Guide_V1.02
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2
SPKN
O
Negative receiver output
3
SPKP
I
Positive receiver output
4
MICP
O
Positive microphone input
3.3 SIM Card Interface
SIMCard holder 1(J202) is the main holder, SIM2(J203) is for special module which supports dual sim.
3.4 USB Interface
EVB USB interface (A) could be imaged to two virtual ports.
Figure5: Virtualserial port
Enhanced COM port: AT communication
Standard COM port: Debug
CP2105 driver is available here:
http://www.silabs.com/products/interface/usb-bridges/Pages/usb-bridges.aspx