DS1339 RTC

Other Hardware Sensors
1

Hello,

I am just wondering if anyone has interfaced to a Maxim DS1339 RTC?

The reason I am interested in this is it supports 400khz I2C bus, whereas the DS1307 only supports up to 100khz.
I currently thave the DS1307 in my design however my design now uses 400khz as the bus, so I cant talk to the DS1307.

I did a google search and found this site, which lists all the RTC's, however I havent yet found anyones examples.

I assume it may be a case of writing a library for it myself.... somehow...

Open to other RTC options too, just need one that talks I2C @ 400khz, and ideally is already supported by Arduino.

Thanks
James

2

Actually, just spotted the DS1337 RTC, which appears people have used, and looking at the datasheet that supports 400khz I2C too.

Time to do some reading.

Cheers
James

3

I assume it may be a case of writing a library for it myself.... somehow...

Interesting overview, esp the DS1388, with 1/100 presision looks quite interesting to be used as NTP

a quick look shows that the 1339 and 1337 (and others) are quite similar for the first 7 registers, so you could use one of the available 1307 libraries as a starting point.

4

I use the DS1337 on my PICO1TRC and PICOBEE boards.
I use the ATMEL I2C library and my own RTC library.
Application examples (including alarms and interrupts)
are on my site --

http://wiblocks.luciani.org/PICO/PICO1TRC-index.html

(* jcl *)

5

I just happened to see this thread. I've created a breakout for the DS1339
RTC, including an Arduino library as it seemed the best option for its tolerance of a wide range of voltages as well as two alarms - you can check it out here if you like - http://www.instructables.com/id/RTC-Breakout-for-DS1339-on-Arduino-low-cost-batter/

-Sridhar