I2S And I2C Interfaces - Quectel QuecOpen AG525R-GL Hardware Design

3.12. I2S and I2C Interfaces

The module provides I2S and I2C interfaces for audio function design.
Table 17: Pin Definition of I2S Interface
Pin Name Pin No.
CDC_RST 77
I2S_MCLK 81
I2S_WS 73
I2S_SCK 75
I2S_DIN 76
I2S_DOUT 78
Table 18: Pin Definition of I2C Interface
Pin Name Pin No.
I2C1_SCL 79
I2C1_SDA 80
The following figure shows a reference design of I2S and I2C interfaces with an external codec IC.
Figure 24: Reference Circuit of I2S and I2C Application with Audio Codec
AG525R-GL_QuecOpen_Hardware_Design
I/O Description
DO Codec reset
DO Clock output for codec
IO I2S word select
DO I2S clock
DI I2S data in
DO I2S data out
I/O Description
OD I2C serial clock
OD I2C serial data
Automotive Module Series
AG525R-GL QuecOpen Hardware Design
Comment
1.8 V power domain.
Can be configured to
GPIOs.
Comment
Require external pull-up to 1.8
V.
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