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Library: DS1302

This library was made because I wanted an easy way to interface and use the DS1302 trickle-charge timekeeping chip.

DS1302DS1302 pinoutMy Arduino running the DS1302_LCD Demo

The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. The clock operates in either the 24-hour or 12-hour format with an AM/PM indicator (The library only support the 24-hour mode).

Interfacing the DS1302 with a microprocessor is simplified by using synchronous serial communication. Only three wires are required to communicate with the clock/RAM: CE, I/O (data line), and SCLK (serial clock). Data can be transferred to and from the clock/RAM 1 byte at a time or in a burst of up to 31 bytes. The DS1302 is designed to operate on very low power and retain data and clock information on less than 1µW.

The DS1302 is the successor to the DS1202. In addition to the basic timekeeping functions of the DS1202, the DS1302 has the additional features of dual power pins for primary and backup power supplies, programmable trickle charger for VCC1, and seven additional bytes of scratchpad memory.

Download:

DS1302.zip
(Filesize is 367.75 KiB. Downloaded 29818 times)


Four demos are included to demonstrate most of the functions.

Changes:
v1.06 Aug 2010initial release
v2.023 Aug 2010Added functions to use on-chip RAM.
v2.117 Nov 2010Added setTCR();
v2.226 Jan 2012Added support for Arduino 1.0 IDE

Datasheet:

CLICK HERE TO VIEW

Compatibility:

WorkingArduino Duemilanove w/ATmega328
WorkingArduino Uno
Not tested, UnsupportedArduino Leonardo
WorkingArduino Mega
WorkingArduino Mega2560
Not tested, UnsupportedArduino Due
Not tested, UnsupportedBobuino
Not tested, UnsupportedTeensy 3.1
Working = Working   Not working: Not working
Not tested, Unsupported = Not tested, Unsupported

Manual:

CLICK HERE TO VIEW
The manual is included in the download

License:

By downloading the library you accept the following license:
Creative Commons BY-NC-SA Logo
Creative Commons (CC BY-NC-SA 3.0)
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