K53 : Power-Up Sequence about 5v tolerant GPIO

[koichisakagami]

Dear community,
I have a question about power-up sequence for 5v tolerant GPIO .

Device is Kinetis K50.

[Question]
When VDD power is not turned on ,
Is it possible to add a 5v input voltage to the 5v tolerant GPIO ?

Best Regards,
Koichi Sakagami

[Hui_Ma · Accepted solution]

Hi,

5 volt tolerant digital I/O pins are internally clamped to VSS through a ESD protection diode. There is no diode to VDD.

There is no problem to apply 5V input voltage on those pins when VDD without power up.

Wish it helps.
best regards
Ma Hui

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[koichisakagami]

Dear Ma Hui san,

Thank you for your reply.

I got it .

Best Regards,

Koichi Sakagami