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PCF2129 not working with battery. System getting stuck in i2c

Question asked by Aditya Saini on Sep 2, 2016
Latest reply on Sep 6, 2016 by Aditya Saini

We have a #PCF2129 RTC connected to an mcu via i2c. The i2c is shared by 2 other devices. The system works fine when the battery is not connected. All three slaves works fine over a single i2c. But when we connected the battery to the RTC the entire i2c operation hangs up. The system has a display which shows the current time on #RTC. The system is able to retain the correct value without battery after a software reset.

 

Is there some configuration change that is needed to be made to make it work with a 3v battery?

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