LPC MicrocontrollersのトピックRe: Question about RTC general purpose registers on LPC1857FET256

Question about RTC general purpose registers on LPC1857FET256

billsheng — Wed, 20 Jul 2016 02:49:56 GMT

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.

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.

Re: Question about RTC general purpose registers on LPC1857FET256

Hui_Ma — Wed, 24 Aug 2016 06:54:53 GMT

I will check this issue with LPC Product team and check if there with similar issues.

I will let you know when there with any feedback.

Thank you for the patience.

Have a great day,
Ma Hui
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Re: Question about RTC general purpose registers on LPC1857FET256

Hui_Ma — Fri, 26 Aug 2016 05:30:39 GMT

First of all, thank you for the patience.

I got the feedback from LPC product team:

The LPC1857 User Manual with incorrect description about RTC general purpose registers reset value.

The correct description is that: The register value is undefined after reset.

It's a document issue. Thank you for the attention.

Wish it helps.

Re: Question about RTC general purpose registers on LPC1857FET256

billsheng — Wed, 31 Aug 2016 03:17:46 GMT

Thanks a lot for the answer.

May I pop a suggestion that could NXP speed up the question post out?

I found that my question was postponed several weeks be it posted out.

Re: Question about RTC general purpose registers on LPC1857FET256

Hui_Ma — Wed, 31 Aug 2016 07:19:13 GMT

Hi Bill

The NXP community had been maintained last month to add more products be supported.

So far, the NXP community should not with that delay posted issue.

Sorry for that may causing any inconveniences.

best regards,

Hui