Wi-Fi&Bluetooth Module Series
FC800L_Hardware_Design 22 / 50
3.4. Power Supply
The following table shows the power supply pins and ground pins of FC800L.
Table 5: Definition of Power Supply and GND Pins
FC800L is powered by VBAT and VDDIO, and VBAT is recommended to use a power supply chip with
maximum output current more than 1.2 A. The following figure shows the recommended power up timing
of FC800L.
RTC_CLK
31
DI
External 32.768 kHz clock
input
VDDIO power domain
CHIP_EN
15
DI
Module enable pin
Pull up to VDDIO internally
through a 4.7
kΩ resistor, high
level by default.
VDDIO power domain
RF Antenna Interfaces
Pin Name
Pin No.
I/O
Description
Comment
ANT_BT
2
AIO
Bluetooth antenna
interface
50 Ω impedance.
ANT_WIFI
9
AIO
Wi-Fi antenna interface
RESERVED Interfaces
Pin Name
Pin No.
I/O
Description
Comment
RESERVED
12
–
14, 24
–
26, 33, 35, 37, 44
–
46, 48
Keep these pins open.
Pin Name
Pin No.
Description
Min.
Typ.
Max.
Unit
VBAT
36
Power supply for the module
2.97
3.3
3.63
V
VDDIO
34
Power supply for module
’s I/O pins
1.62
1.8
1.98
V
GND
1
,
3
–
8, 10
–
11, 23, 32, 39, 47