17
Customize the embedded system based on
Your
Idea
2 Peripherals Introduction
2.1 Power
⚫
5V Power (P1)
The
DC JACK is
5.5 x 2.1mm, 3-pin plug Type. Typical 5V/3A DC adapter.
Pin
Signal
Description
Pin
Signal
Description
1
VDD5V
Main power supply. DC 5V power in
2
GND
Ground
3
GND
Ground
⚫
Li-Battery (J1)
Pin
Signal
Description
Pin
Signal
Description
1
VBAT
3.7V battery
2
BAT_TS
Battery Temperature Sensor
Input or External ADC Input
3
GND
Ground
⚫
RTC (BT1)
The backup battery (3V) is used to ensure the RTC (frequency 32.768KHz) is still able to work after
power off. Cell model: CR1220.
Pin Signal
Description
Pin Signal
Description
1
VCC-RTC
3V battery
2
GND
Ground
3
2
1