I2C Interface; I2C Design Guide - SimCom SIM7600V-H User Manual

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Figure 23: Audio codec reference circuit
Note: Module can transmit PCM data by theUSB portbesidesthe PCM interface. For more
details please refer to documents [1] and [23].
3.7

I2C Interface

Module provides a I2C interface compatible with I2C specification, version 2.1, with clock rate up
to 400 kbps. Its operation voltage is 1.8V.
3.7.1

I2C Design Guide

The following figure shows the I2C bus reference design.
Figure 24: I2C reference circuit
Note ：
SDA and SCLhave pull-up resistors in module. So, 2 external pull up resistors are not needed in
application circuit.
"AT+CRIIC and AT+CWIIC" AT commands could be used to read/write register values of the
I2C peripheral devices.For more details about AT commands please refer to document [1].
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