Data Sheet

K255B-SR
FN-LINK TECHNOLOGY LIMITED Proprietary & Confidential Information
10
36
VCC33
P
Main power voltage source input
3.3V
37
NC
－
No connect
38
NC
－
No connect
39
GND
－
Ground connections
40
UART_TXD
O
Bluetooth UART interface
1.8V
41
UART_RXD
I
Bluetooth UART interface
1.8V
42
UART_RTS_N
O
Bluetooth UART interface
1.8V
43
UART_CTS_N
I
Bluetooth UART interface
1.8V
44
NC
－
No connect
45
NC
－
No connect
46
GND
－
Ground connections
47
ANT_SEL/NC
O
MUX Uart BT Print Out
If not used keep NC
48
GND
－
Ground connections
49
HOST_WAKE_BT
I
HOST wake-up Bluetooth device
The function of this PIN will be updated in
future version
1.8V
50
BT_WAKE_HOST
O
Bluetooth device to wake-up HOST
The function of this PIN will be updated in
future version
1.8V
P:POWER I:INPUT O:OUTPUT VDDIO:1.8V