Usage of input only pins as Rx lines

PaulFreund
Posts: 31
Joined: Wed Nov 15, 2017 9:07 pm

Usage of input only pins as Rx lines

Postby PaulFreund » Tue Jul 09, 2019 1:31 pm

Hi,

before working on a new design I wanted to make sure that the following is possible.

The pins GPIO36, GPIO37, GPIO38, GPIO39, GPIO34 and GPIO35 are marked as input only in the IO_MUX documentation of the ESP32 specification on page 49.

Can those pins be used as UART Rx and SPI MISO for example without limitations or do they follow other (additional) rules?

Best regards,

Paul

ESP_Sprite
Posts: 2716
Joined: Thu Nov 26, 2015 4:08 am

Re: Usage of input only pins as Rx lines

Postby ESP_Sprite » Thu Jul 11, 2019 8:31 am

Yes, they can.

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