Wi-Fi&Bluetooth Module Series
FC909A_Hardware_Design 18 / 49
Table 4: Pin Description
2
SDIO_DATA2 is the function configuration pin, please select SDIO mode or SPI mode by configuring this pin. See
chapter 3.5.4
for details
.
Power Supply
Pin Name
Pin No.
I/O
Description
Comment
VBAT
9
PI
Power supply for the
module
VDDIO
22
PI
Power supply for
module
’s I/O pins
VIN_LDO_OUT
21
PO
Internal buck output for
the module
VIN_LDO
23
PI
Internal buck input for
the module
GND
1, 3, 20, 31, 33, 36
WLAN Application Interface
Pin Name
Pin No.
I/O
Description
Comment
WLAN_EN
12
DI
WLAN function enable
control
VDDIO power domain.
Active high.
WLAN_WAKE
13
DO
Wake up the host by
WLAN
VDDIO power domain.
SDIO_DATA2
2
14
DIO
SDIO data bit 2/NC
VDDIO power domain.
Supports 1-bit or 4-bit mode.
SDIO_DATA3
15
DIO
SDIO data bit 3/NC
SDIO_CMD
16
DIO
SDIO command
SDIO_CLK
17
DI
SDIO clock
SDIO_DATA0
18
DIO
SDIO data bit 0
SDIO_DATA1
19
DIO
SDIO data bit 1/IRQ
Bluetooth Application Interface
Pin Name
Pin No.
I/O
Description
Comment
BT_EN
34
DI
Bluetooth enable control
VDDIO power domain.
Active high.
If unused, pull it down.