Quectel FC905A User Manual page 24

SDIO link). SDIO interface definition is as follows:
Table 8: Pin Definition of SDIO Interface
Pin Name
SDIO_DATA2
SDIO_DATA3
SDIO_CMD
SDIO_CLK
SDIO_DATA0
SDIO_DATA1
The following figure shows the SDIO interface connection between FC905A and host.
FC905A
SDIO_CLK
SDIO_CMD
SDIO_DATA0
SDIO_DATA1
SDIO_DATA2
SDIO_DATA3
To ensure that the interface design complies with the SDIO 3.0 specification, the following principles are
recommended to be adopted:
FC905A_Hardware_Design
Pin No. 1-bit Mode
14 NC
15 NC
16 SDIO command
17 SDIO clock
18 SDIO data bit 0
19 IRQ
NM NM
NM NM
Figure 4: SDIO Interface Connection
Wi-Fi&Bluetooth Module Series
4-bit Mode
SDIO data bit 2
SDIO data bit 3
SDIO command
SDIO clock
SDIO data bit 0
SDIO data bit 1
VIO
SDIO_CLK
SDIO_CMD
SDIO_D0
SDIO_D1
SDIO_D2
SDIO_D3
NM
NM
HOST
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