Page 1 of 1

Should the reset (EN) pin have an RC circuit?

Posted: Sun Apr 16, 2023 8:01 pm
by IamDikoy
I debugged my code using the WROOM32 board. It works well.
Now I have made my own board and it runs ~ every tenth time. Nine out of ten it won't start.
Power is good. Used 1117 as elsewhere. Filter capacitors are installed.
Perhaps I need to add a capacitor or RC to the EN pin? For hardware power-up reset...

Re: Should the reset (EN) pin have an RC circuit?

Posted: Mon Apr 17, 2023 11:49 am
by ESP_krzychb
Hi IamDikoy,

RC circuit at CHIP_PU pin is indeed recommended. Check the Section "2.2.1 Power-on Sequence" in ESP32 Hardware Design Guidelines.