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Question about RTC general purpose registers on LPC1857FET256

Question asked by Bill Sheng on Jul 19, 2016
Latest reply on Aug 31, 2016 by Hui_Ma

We got a 8D quality urgent case, which we found caused by RTC general purpose registers on LPC1857.

It seems the data stored in REGFILE59 changed randomly in some condition.

LPC1857REGFILE.jpg

For most boards, there had no problem, except 4PCS we found currently.

The MCU on the problem boards have 2 PCS with ESD15330A and ESD15370A separately.

 

We're struggling to find the root cause.

It's appreciated that someone could give us some hints for this problem.

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