Product Info

Automotive Module Series
AG521R-NA QuecOpen Hardware Design
AG521R-NA_QuecOpen_Hardware_Design 55 / 92
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.
CDC_RST
I2S_MCLK
I2S_CLK
I2S_WS
I2S_DIN
I2S_DOUT
I2C1_SCL
I2C1_SDA
Module
BIAS
INP
INN
LOUTP
LOUTN
Codec
RESET
MCLK
BCLK
WCLK
DOUT
DIN
SCL
SDA
1.8V
2.2K 2.2K
Figure 24: Reference Circuit of I2S and I2C Application with Audio Codec
The module works as a master device pertaining to I2C interface.
3.13. SDIO Interface
The module provides an SDIO interface. It is recommended to use the interface for eMMC application.
Table 19: Pin Definition of SDIO Interface
I2S_DOUT
261
DO
I2S data out
Pin Name
Pin No.
I/O
Description
Comment
NOTE