Kinetis MicrocontrollersのトピックRe: K53 : Power-Up Sequence about 5v tolerant GPIO

K53 : Power-Up Sequence about 5v tolerant GPIO

koichisakagami — Wed, 10 Sep 2014 10:02:50 GMT

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

Re: K53 : Power-Up Sequence about 5v tolerant GPIO

Hui_Ma — Thu, 11 Sep 2014 06:07:45 GMT

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

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

Re: K53 : Power-Up Sequence about 5v tolerant GPIO

koichisakagami — Thu, 11 Sep 2014 09:31:24 GMT

Dear Ma Hui san,

Thank you for your reply.

I got it .

Best Regards,

Koichi Sakagami