This module is specifically designed for raspberry RT module. The module uses I2C mode to communicate with raspberry. The onboard DS1307 clock chip and a 1220 button battery ensure that the raspberry can still remember the time after power is lost. Set aside the serial port, convenient way to debug TTL.
Features:
1：On board US letter DS1307 chip;
CR1220 button battery never power;
Can be directly used shell script operation;
Lead raspberry to send a string to facilitate debugging;
Programmable square wave output.
2: Product Interface:
Raspberry Pi B version 2X13 socket;
Raspberry Pi A + / B + / 2 generation 2X20 socket;
Support raspberry to send B / A + / B + / 2;
2 * 5p 2.54mm pitch interface.
3: Product parameters:
Working voltage is 5V;
0 ° C to + 40 ° C range of ± 2ppm clock accuracy;
The real-time clock provides seconds, minutes, hours, weeks, dates, months, and years of information, and provides leap year compensation valid for 2100 years;
Two calendar alarm clocks;
Operating temperature: -10 ° C to + 85 ° C.

Package Type:
All goods will pack into cartons and wrapped full of waterproof tape before shipment .

We can accept customized package to meet different requirements :
1.Every item will separately pack into plastic bag ,component, module can be packed in anti static bag .
2.Some fragile products such as the display screen can be packed in bubble bag .
3.Some large machines can be packed in wooden cases.
4.We can label JH code or client's code on package so that customers can check easily after receive goods.