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 off. In order to offering a convenient way to debug, there are five pin has been setup which are 5v, 3.3v, Rxd,Txd on borad.

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

Programmable Square-Wave Output Signal

Parameters

Accuracy ±20ppm from 0°C to +40°C

Work voltage 5V

Battery Backup Input for Continuous Time keeping

Real-Time Clock Counts Seconds, Minutes, Hours, Day, Date, Month, and Year with Leap Year • Compensation Valid Up to 2100

Work temperature 0°C to +70°C

Documents

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