Sdio Interface - Quectel QuecOpen AG521R-NA Hardware Design

I2S_DOUT 261
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.
CDC_RST
I2S_MCLK
I2S_DOUT
I2C1_SCL
I2C1_SDA
Module
Figure 24: Reference Circuit of I2S and I2C Application with Audio Codec
NOTE
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
Pin Name Pin No.
AG521R-NA_QuecOpen_Hardware_Design
DO
I/O Description
OD I2C serial clock
OD I2C serial data
I2S_CLK
I2S_WS
I2S_DIN
1.8V
I/O Description
AG521R-NA QuecOpen Hardware Design
I2S data out
RESET INP
MCLK INN
BCLK
WCLK
DOUT
DIN
LOUTP
SCL
SDA
LOUTN
Codec
Comment
Automotive Module Series
Comment
Require external pull-up to 1.8 V.
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