MK64FN1M0VLL12 reset problem after power failure

[f_schwamborn]

Hello,

i use a MK64FN1M0VLL12 processor on 2 applications, a FRDM-K64f board and a custom application. I noticed that the processor would not boot after longer power failures (> than 20 seconds) and only a manual reset makes the processor boot again. Shorter periods do not lead to this behaviour.

The ethernet phy does not seem to fail because it provides a stable 50MHz clock output.

Does anyone have an idea, what may cause this problem ?

Regards

Fabian

[adriancano · Accepted solution]

Hi Fabian,

This issue was already discussed, check this thread:

FRDM-K64F booting issue when powered from USB port

Hope this information can help you.

Best Regards,
Adrian Sanchez Cano
Technical Support Engineer
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[f_schwamborn]

Hello,

thank you for your help. I had the same issue with a capacitor on the NMI pin.

Best regards,

Fabian