Wi-Fi&Bluetooth Module Series
AF20_Hardware_Design
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3.5.2. SDIO Interface
The following table shows the pin definition of the SDIO interface of AF20.
Table 7: Pin Definition of SDIO Interface
Pin Name
Pin No.
I/O
Description
Comment
SDIO_D3
22
DIO
SDIO data bit 3
1.8 V power domain
SDIO_D2
23
DIO
SDIO data bit 2
1.8 V power domain.
It is pulled up to 1.8 V internally.
SDIO_D1
24
DIO
SDIO data bit 1
1.8 V power domain
SDIO_D0
25
DIO
SDIO data bit 0
SDIO_CLK
26
DI
SDIO clock
SDIO_CMD
27
DIO
SDIO command