Reset problem when power off on raspbery pi ds3231 [Solved]

Ömer Faruk · Joined: 15 Nov 2018 Posts: 42 Location: Çanakkale

Hello everyone

I am having a problem with raspberry pi Ds3231 module when i cut its power it
takes 00:00:00 values. Is there anyone who experienced this problem. What are possible problems? I don't think firmware problems cause this. I need your help. (If needed i can post the code)

Here the module

https://www.amazon.com/DAOKI-DS3231-Precision-Arduino-Raspberry/dp/B01JGNKNNA

Note: Once the module overheated for a while but it can keep the time correct.

dluu13 · Joined: 28 Sep 2018 Posts: 395 Location: Toronto, ON

That looks like a real time clock. If there's no battery backup then when you cut the power I would expect it to reset it's values.

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Ömer Faruk · Joined: 15 Nov 2018 Posts: 42 Location: Çanakkale

temtronic · Posted: Wed Mar 13, 2019 5:13 pm

this..

Ttelmah · Joined: 11 Mar 2010 Posts: 19496

Have to agree wholeheartedly with Jay's comment.
These are small scale CMOS chips. No 'power' elements, just very
small FET's and gates. For this type of device to 'overheat', implies it has to
have been incorrectly connected or experienced an overvoltage. Most
likely the actual internal FET elements that switch the clock circuitry to
the battery supply has been damaged, and hence it's failure to keep
time.
You can split devices into a number of 'classes' in terms of the abuse they
can take. Some devices like the old 2N2055 transistor, can survive
amazing things. The basic early PIC16's are also quite rugged. But low
power devices, generally are much less likely to survive if something is
done wrong.
I'd say the 'odds' are heavily stacked in favour of the chip having been
damaged. Have to ask 'what was done' to make it overheat?.

Ömer Faruk · Joined: 15 Nov 2018 Posts: 42 Location: Çanakkale