Real Time Clock Module (DS1307) V1.1 (SKU:DFR0151)
Contents
1
Introduction
2
Specification
3
Application
4
Tutorial
4.1
Connection diagram
4.2
Sample Code
4.3
Result
5
Trouble shooting
Introduction
The DS1307 Real Time Clock developed by one of our designers: Waiman. The module comes fully
assembled and pre-programmed with the current time (ok, so it's our current time - MST). The
included Lithium coin cell battery (CR1225 41mAh) will run the module for a minimum of 9 years (17
years typical) without external 5V power. The DS1307 is accessed via the I2C protocol.
Except the DS1307 real time clock, the module also integrate the I2C EEPROM chip(24C32) and the
DS18B20 sensor interface. The I2C EEPROM makes it possible to save the sensor data easily
without spending too much microcontroller source. And the DS18B20 interface with the pull-up
resistor embeded will be helpful to extend temperature monitoring feature for your project.
Specification
Working voltage: 5v
Two wire I2C interface
Hour : Minutes : Seconds AM/PM
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