User's Manual

Wi-Fi&BT Module Series
FC20 Series Hardware Design
FC20_Series_Hardware_Design Confidential / Released 16 / 47
3.3. Pin Description
The following tables show the pin definition of FC20.
Table 3: I/O Parameters Definition
Type
Description
IO
Bidirectional input/output
DI
Digital input
DO
Digital output
PI
Power input
Table 4: Pin Description
Power Supply
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
VDD_3V3
21
PI
Main power supply
for module
Vmax=3.46V
Vmin=3.14V
Vnorm=3.3V
It must be able to
provide sufficient
current up to 0.9A.
VIO
11
PI
Power supply for
module IO pin
Vmax=1.89V
Vmin=1.71V
Vnorm=1.8V
It is powered by EC20
R2.0/EC21/EC25
module.
GND
1, 12, 20,
28, 29,
31, 36,
38~40,
43~45,
48~52
Ground
WLAN Interface
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
WAKE_ON_
WIRELESS
32
DO
Wake up host
V
OL
max=0.18V
V
OH
min=1.62V
1.8V power domain.
Active low.
If unused, keep this
pin open.
WLAN_EN
9
DI
WLAN enabled
V
IL
min=-0.3V
V
IL
max=0.54V
1.8V power domain.
Active high.