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3.6.2
PCM Application Guide
The following figure shows the external codec reference design.
3.7
I2C Interface
SIM7000 provides a I2C interface compatible with I2C specification, version 5.0, with clock rate
up to 400 kbps. Its operation voltage is 1.8V.
The following figure shows the I2C bus reference design.
Note ： I2C_SDA and I2C_SCL do not have pull-up resistors in module. So the two external
pulling up resistors are 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].
3.8
Network status
The NETLIGHT pin is used to control Network Status LED, its reference circuit is shown in the
SIM7000 _Hardware Design _V1.00
Figure 24: Audio codec reference circuit
Figure 25: I2C reference circuit
Smart Machine Smart Decision
2017-05-23
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