We will be on vacation from December 21st to January 8th. Orders placed in this period will be shipped starting January 9th.
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
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 (with support for advanced features such as square wave interrupts and alarm interrupt)
Pull-up resistors for SDA/SCL as well as for the 32KHz oscillator and square wave ouptut/alarm interrupt output
Greg | March 16, 2013
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