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yangyong
Level 5
Level 5
Distributor - Jingchuan(GC)
5 comments on blog First comment on blog 50 questions asked

The GPIO(port13)'s  Absolute Maximum Ratings is as follows:

yoya_4785701_0-1645585565988.png

the Absolute Maximum Ratings mean is the clamping circuit clamps the input at VDDIO+0.5 or  the input can't exceed VDDIO+0.5.

when the VDDIO is 3.2V,  The input is 5V.  is the  GPIO  damaged. 

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1 Solution
JJack
Level 5
Level 5
Associated Partner - Distributor Rutronik
25 likes received 100 sign-ins 50 replies posted

Hi yoya_4785701,

when the VDDIO is 3.2V, The input is 5V. is the GPIO damaged?

Yes, I guess so. Seems like there is no clamping diode on the high side any more...

There is another limit of the abs max values to consider: the injected current spec.

It says that the maximum injected current into any I/O pin must not exceed a certain value:

Ralf_0-1645616841703.png

This limit provides that the internal clamping diodes are not overloaded.

View solution in original post

1 Reply
JJack
Level 5
Level 5
Associated Partner - Distributor Rutronik
25 likes received 100 sign-ins 50 replies posted

Hi yoya_4785701,

when the VDDIO is 3.2V, The input is 5V. is the GPIO damaged?

Yes, I guess so. Seems like there is no clamping diode on the high side any more...

There is another limit of the abs max values to consider: the injected current spec.

It says that the maximum injected current into any I/O pin must not exceed a certain value:

Ralf_0-1645616841703.png

This limit provides that the internal clamping diodes are not overloaded.