Wi-Fi&Bluetooth Module Series
FC909A_Hardware_Design 23 / 49
Table 8: Pin Definition of SDIO Interface
The following figure shows the SDIO interface connection between FC909A and host.
SDIO_CLK
SDIO_CMD
SDIO_DATA0
SDIO_DATA1
SDIO_DATA2
SDIO_DATA3
Host
FC909A
SDIO_DATA0
SDIO_DATA1
SDIO_DATA2
SDIO_DATA3
SDIO_CLK
SDIO_CMD
10
K
VDDIO
NM
_
10
K
NM
_
10
K
NM
_
10
K
NM
_
10
K
NM
NM
NM
NM
NM
NM
NM
_
10
K
Pin Name
Pin No.
1-bit Mode
4-bit Mode
SDIO_DATA2
14
NC
SDIO data bit 2
SDIO_DATA3
15
NC
SDIO data bit 3
SDIO_CMD
16
SDIO command
SDIO command
SDIO_CLK
17
SDIO clock
SDIO clock
SDIO_DATA0
18
SDIO data bit 0
SDIO data bit 0
SDIO_DATA1
19
IRQ
SDIO data bit 1
