Wlan Application Interface; Sdio Interface - Quectel FC908A Hardware Design

DCR
Rated current (based on temperature rise）

3.5. WLAN Application Interface

The following figure shows the WLAN application interface connection between FC908A and the host.

3.5.1. SDIO Interface

FC908A is used for SDIO 2.0 interface, supports 1-bit mode or 4-bit mode (automatic detection when
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
FC908A_Hardware_Design
FC908A
SDIO
WLAN_EN
WLAN_WAKE
Figure 5: WLAN Application Interface Connection
Pin No. 1-bit Mode
14 NC
15 NC
16 SDIO command
17 SDIO clock
18 SDIO data bit 0
19 IRQ
Wi-Fi&Bluetooth Module Series
< 0.2
1.15
SDIO
WLAN_EN
WLAN_WAKE
4-bit Mode
Ω
A
Host
SDIO data bit 2
SDIO data bit 3
SDIO command
SDIO clock
SDIO data bit 0
SDIO data bit 1
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