CAP1 and CAP2 rc circuit functionality

damian
Posts: 6
Joined: Thu Mar 08, 2018 9:19 am

CAP1 and CAP2 rc circuit functionality

Postby damian » Thu Mar 08, 2018 10:00 am

I have doubts about the function of the RC circuit connected to CAP1 and CAP2. The only words about it are in ESP32 Hardware Design Guidelines :
Removing the RC circuit may slightly affect ESP32 in Deep-sleep mode

So the rc circuit is involved in the 8MHz internal oscillator used in deep-sleep mode?
If I never go in deep-sleep mode can I leave CAP1 and CAP2 unconnected?
Thanks!!

chris1seto
Posts: 2
Joined: Tue Jun 12, 2018 5:05 pm

Re: CAP1 and CAP2 rc circuit functionality

Postby chris1seto » Mon Jun 25, 2018 9:56 pm

Hi, I am also wondering about this. Bump!

damian
Posts: 6
Joined: Thu Mar 08, 2018 9:19 am

Re: CAP1 and CAP2 rc circuit functionality

Postby damian » Sat Jun 30, 2018 8:21 am

After some experiments I saw that the removal of this RC circuit doesn't affect anything visible (I note that I don't use deep sleep in my application).
However I hope that the functionality of this circuit will be explained in an upcoming release of the official technical documentation.

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krzychb
Posts: 188
Joined: Sat Oct 01, 2016 9:05 am
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Re: CAP1 and CAP2 rc circuit functionality

Postby krzychb » Fri Aug 17, 2018 6:20 pm

Explanation is provided in viewtopic.php?f=12&t=6685&p=29278#p29278

damian
Posts: 6
Joined: Thu Mar 08, 2018 9:19 am

Re: CAP1 and CAP2 rc circuit functionality

Postby damian » Wed Aug 29, 2018 12:04 pm

Thanks krzychb.

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