LPC MicrocontrollersのトピックRe: LPC 1820 sometime will boot up fail !

LPC 1820 sometime will boot up fail !

chenblake — Thu, 02 Feb 2017 06:16:39 GMT

Hello All:

We got a boot up problem.

Our project use the LPC1820FBD144, the power source from USB VBUS.

I take USB cable plug in and plug out repeatedly.

Or press the reset button repeatedly

It sometime will boot up fail.

The failure rate is 1~2 / 10 time.

Is that Known Issue?

Because of I found the documents " LPC18XX-RN.pdf "

It mentions the similar problem.

" In a few hundred reset cycles one cycle might fail with a Hard Fault right after PLL initialization code "

If it is this known issue, how can we do?

If anyone meet the same problem.

or ,

If anyone has solution can resolve it.

Thanks

Re: LPC 1820 sometime will boot up fail !

converse — Thu, 02 Feb 2017 16:19:05 GMT

There are some things in the errata that may be relevant

http://www.nxp.com/documents/errata_sheet/ES_LPC18X0.pdf

Re: LPC 1820 sometime will boot up fail !

jeremyzhou — Tue, 07 Feb 2017 03:25:36 GMT

Hi Chen Blake,

Thank you for your interest in NXP Semiconductor products and the opportunity to serve you.

Before answer your question, I was wondering if you can tell me which boot mode you choose.
I'm looking forward to your reply.
Have a great day,
Ping

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Re: LPC 1820 sometime will boot up fail !

chenblake — Tue, 07 Feb 2017 03:47:27 GMT

Hi Jeremyzhou:

Thanks for you reply.

I already found the cause.

That is NXP1820 PLL Clock frequency ramp-up need some delay for stable.

So, I add delay for it. And repair the problem.

The way is share for other user. See the bellow figure.

Re: LPC 1820 sometime will boot up fail !

chenblake — Tue, 07 Feb 2017 04:00:17 GMT

The boot mode is SPIFI.

Re: LPC 1820 sometime will boot up fail !

chenblake — Tue, 07 Feb 2017 04:39:50 GMT

Thanks for your reply and share!