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2
SDIO_DATA2
14
SDIO_DATA3
15
SDIO_CMD
16
SDIO_CLK
17
SDIO_DATA0
18
SDIO_DATA1
19
Bluetooth Application Interface
Pin Name
Pin No.
BT_EN
34
HOST_WAKE_BT
6
BT_WAKE_HOST
7
PCM_DOUT
25
PCM_CLK
26
PCM_DIN
27
PCM_SYNC
28
BT_RTS
41
BT_TXD
42
BT_RXD
43
BT_CTS
44
RF Antenna Interfaces
Pin Name
Pin No.
ANT_WIFI0/BT
2
2
SDIO_DATA2 is the function configuration pin, you can select SDIO mode or SPI mode by configuring this pin. See
chapter 3.5.4 for details.
FC908A_Hardware_Design
DIO
SDIO data bit 2/NC
DIO
SDIO data bit 3/NC
DIO
SDIO command
DI
SDIO clock
DIO
SDIO data bit 0
DIO
SDIO data bit 1/IRQ
I/O
Description
DI
Bluetooth enable control
DI
Host wakes up Bluetooth
DO
Bluetooth wakes up host
DO
PCM data output
DI
PCM clock
DI
PCM data input
DI
PCM data frame sync
Bluetooth UART request
DO
to send
DO
Bluetooth UART transmit
DI
Bluetooth UART receive
Bluetooth UART clear to
DI
send
I/O
Description
Wi-Fi0/Bluetooth
AIO
antenna interface
Wi-Fi&Bluetooth Module Series
VDDIO power domain.
Supports 1-bit or 4-bit mode.
Comment
VDDIO power domain.
Active high.
If unused, pull it down.
VDDIO power domain.
If unused, keep them open.
Comment
50 Ω impedance.
19 / 49
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