Can't wake up from powerdown

[qiongbo_liang2]

Hello

I found a strange problem when using the powerdown mode of lpc18xx.

If I don't update flash before powerdown, I can wake up normally.

But when I did flash updates before powerdown, I couldn't wake up.

This flash update action, including erasing flash and writing flash, It need about 400 ms.

[jeremyzhou]

Hi 梁 琼波,

Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
According to your statement, you suspect that the execute Flash operation likes the erasing flash and writing flash prior to force the MCU enter low power mode, it will cause the MCU is unable to be waked up.
Do it right? If yes, I was wondering if you can share a simple demo which can replicate the phenomenon, as I'd like to replicate this phenomenon on my site and figure it out.
Have a great day,
TIC

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