Automotive Module Series
AG525R-GL QuecOpen
Hardware Design
AG525R-GL_QuecOpen_Hardware_Design 57 / 104
3.12. I2S and I2C Interfaces
The module provides I2S and I2C interfaces for audio function design.
Table 17: Pin Definition of I2S Interface
Table 18: Pin Definition of I2C Interface
Pin Name
Pin No.
I/O
Description
Comment
I2C1_SCL
79
OD
I2C serial clock
Require external pull-up to 1.8
V.
I2C1_SDA
80
OD
I2C serial data
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
Pin Name
Pin No.
I/O
Description
Comment
CDC_RST 77
DO
Codec
reset
1.8 V power domain.
Can be configured to
GPIOs.
I2S_MCLK
81
DO
Clock output for codec
I2S_WS
73
IO
I2S word select
I2S_SCK 75 DO
I2S
clock
I2S_DIN
76
DI
I2S data in
I2S_DOUT
78
DO
I2S data out