The Dallas DS3231M Real Time Clock is a compact high precision real
time clock module that comes in a SOIC-8 surface mount package.
It runs on 2.3V to 5.5V supply voltage and is controlled using
the I2C/TWI protocol. It features two hardware alarms with
interrupt, so you can use it to make your microcontroller
do tasks at specific times. Combined with sleep mode this
makes a perfect companion for creating a logging module.
We’ve prepared a breakout board that comes with a backup
battery and gives access to all the features of the RTC
(including interrupt pin and 32kHz square wave output).
We also provide an Arduino (as well as avr-gcc) library
that supports all features of the chip.
- DS3231M high precision Real Time Clock
- Backup battery
- Very compact PCB
- Two TWI/I2C ports to daisy chain with other TWI/I2C devices
- Open Source Arduino and low-level avr-gcc library available on Github
- Pull-up resistors for SDA/SCL as well as for the 32KHz oscillator
and square wave ouptut/alarm interrupt output