Raspberry Pi RTC Module User Manual
www.52pi.com
6
3
：
Produce overview
：
The RTC module is specifically designed for Raspberry Pi. It communicated with
Raspberry Pi through I2C bus. There is a Maxim DS1307 and CR1220 button cell on
the board to keep the real time for a long time after the Raspberry Pi has it’s power
down.
Set a serial port, TTL convenient way online debugging
3
：
Produce Features
：
Use Maxim DS1307 chip
Extends CR1220 button cell backup
Can be operated by a shell
Set a serial port connector
Programmable square-wave output signal
Consumes Less than 500nA in Battery-Backup Mode
Automatic Power-Fail Detect and Switch Circuitry
