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SIM800C_Hardware_Design_V1.02 34 2015-4-27
Figure 33: Amphenol C707 10M006 512 SIM card holder
Table 17: Pin description (Amphenol SIM card holder)
Pin name Signal Description
C1 SIM_VDD SIM card power supply
C2 SIM_RST SIM card reset
C3 SIM_CLK SIM card clock
C5 GND Connect to GND
C6 VPP Not connect
C7 SIM_DATA SIM card data I/O
Note: Every time plug SIM card interval advice is greater than 2s. Otherwise may not be able to correct
detection.
4.9. ADC
Table 18: Pin definition of the ADC
SIM800C provides an auxiliary ADC, which can be used to measure the voltage. Customer can use AT command
“AT+CADC” to read the voltage value. For details of this AT command, please refer to document [1].
Pin name Pin number Description
ADC 38 Analog voltage input
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