User's Manual

Wi-Fi&Bluetooth Module Series
FC41D_Hardware_Design
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3.3. Pin Description
The following tables show the pin description of module:
Table 3: I/O Parameters Description
Table 4: Pin Description
Type
Description
AI
Analog Input
AIO
Analog Input/Output
DI
Digital Input
DIO
Digital Input/Output
DO
Digital Output
OD
Open Drain
PI
Power Input
Power Supply
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
VBAT
15
PI
Power supply for
the module
Vmax = 3.6 V
Vmin = 3.0 V
Vnom = 3.3 V
It must be provided
with sufficient
current up to 0.3 A.
GND
1, 3, 16, 27
Reset
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
CEN
9
DI
Turn on/off and
reset the module
Vmax = 3.6 V
Vmin = 3.0 V
Vnom = 3.3 V
Pulled up to 3.3 V
internally.
UART Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
MAIN_TXD
20
DO
Main UART
3.3 V power domain