ESP32-S3 delicate USB on GPIO19 and GPIO21?

michalk
Posts: 20
Joined: Wed Mar 24, 2021 7:09 pm

ESP32-S3 delicate USB on GPIO19 and GPIO21?

Postby michalk » Mon Sep 12, 2022 3:50 pm

In developing for the S3, I'm using the ESP32-S3-devkitC. Out of ten units, I've damaged about two of them now. It looks like I am destroying the native USB drivers on the chip at GPIO19 and 21, not the CP210 UART.
I can still program through the CP210, so the processor is still alive, but my board uses the native USB.
I don't have anything connected, but USB to those pins, and the schematic for devKitC shows it has protection diodes. Are other people having problems with the onboard port? Should I be taking extra precautions on my board?

chegewara
Posts: 2306
Joined: Wed Jun 14, 2017 9:00 pm

Re: ESP32-S3 delicate USB on GPIO19 and GPIO21?

Postby chegewara » Mon Sep 12, 2022 9:10 pm

I think you can "repair" those devices when you start using the correct pins for native USB, GPIO19 and GPIO20 instead of 19 and 21.

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