Product Info

Wi-Fi&BT Module Series
FC21 Hardware Design
FC21_Hardware_Design 17 / 52
BT_EN 10 DI BT function control
V
IL
min=-0.3V
V
IL
max=0.54V
V
IH
min=1.26V
V
IH
max=2.0V
1.8V power domain.
Active high.
If unused, keep this
pin open.
BT_WAKE_
HOST
46 OD BT wake up the host
V
OL
max=0.18V
V
OH
min=1.62V
1.8V power domain.
Active low.
Pulled up internally.
If unused, keep this
pin open.
PCM_IN 13 DI BT PCM data input
V
IL
min=-0.3V
V
IL
max=0.54V
V
IH
min=1.26V
V
IH
max=2.0V
1.8V power domain.
If unused, keep this
pin open.
PCM_SYNC 14 DI
BT PCM data frame
synchronization
signal
V
IL
min=-0.3V
V
IL
max=0.54V
V
IH
min=1.26V
V
IH
max=2.0V
1.8V power domain.
If unused, keep this
pin open.
PCM_CLK 15 DI
BT PCM data bit
clock
V
IL
min=-0.3V
V
IL
max=0.54V
V
IH
min=1.26V
V
IH
max=2.0V
1.8V power domain.
If unused, keep this
pin open.
PCM_OUT 16 DO BT PCM data output
V
OL
max=0.18V
V
OH
min=1.62V
1.8V power domain.
If unused, keep this
pin open.
BT_UART_
RTS
7 DO
BT UART request to
send
V
OL
max=0.18V
V
OH
min=1.62V
1.8V power domain.
If unused, keep this
pin open.
BT_UART_
CTS
8 DI
BT UART clear to
send
V
IL
min=-0.3V
V
IL
max=0.54V
V
IH
min=1.26V
V
IH
max=2.0V
1.8V power domain.
If unused, keep this
pin open.
BT_UART_
TXD
17 DO
BT UART transmit
data
V
OL
max=0.18V
V
OH
min=1.62V
1.8V power domain.
If unused, keep this
pin open.
BT_UART_
RXD
18 DI
BT UART receive
data
V
IL
min=-0.3V
V
IL
max=0.54V
V
IH
min=1.26V
V
IH
max=2.0V
1.8V power domain.
If unused, keep this
pin open.
Coexistence Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
LTE_UART_
TXD
5 DO
LTE/Wi-Fi&BT
coexistence signal
V
OL
max=0.18V
V
OH
min=1.62V
1.8V power domain.
If unused, keep this