Data Sheet

Smart Machine Smart Decision

SIM800F_Hardware Design_V1.00 43 2015-07-31

 Support high speed mode

 Support slave clock extension

 START/STOP/REPEATED condition

 Manual transfer mode

 Multi-bytes write per transfer (up to 8 data bytes for non-DMA mode)

 Multi-bytes read per transfer (up to 8 data bytes for non-DMA mode)

 Multi-transfer per transaction

 Combined format transfer with length change capability

 Active drive/write-and I/O configuration

Table 24: Pin definition of the I2C

Note:

1. I2C has been pulled up to 2.8V via 4.7KΩ .internally.

2. I2C function is not supported in the standard firmware. If you need, please contact SIMCom.

Table 25: I2C multiplex function

Pin name Pin number Mode 0(default) Mode 1

SDA 37 GPIO SDA

SCL 38 GPIO SCL

4.14 ADC

Table 26: Pin definition of ADC

SIM800F provides an auxiliary ADC, which can be used to measure the voltage. Users can use AT command

“AT+CADC” to read the voltage value. For details about this AT command, please refer to document

[1]

Table 27: ADC specification

Parameter Min Typ Max Unit

Voltage range 0 - 2.8 V

ADC Resolution - 10 - bits

Sampling rate - - 1.0833 MHz

ADC precision - 10 30 mV

Pin name Pin number Description

SDA 37 I2C bus data

SCL 38 I2C bus clock

Pin name Pin number Description

ADC 25 Analog to digital converter