Service Guide

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