GPIO pullup / pulldown

michprev
Posts: 92
Joined: Fri Aug 04, 2017 8:57 pm

GPIO pullup / pulldown

Postby michprev » Fri Apr 13, 2018 9:48 am

Hi,
I have read that GPIO_34 - GPIO_39 have no pullup / pulldown resistors no matter if they are connected to RTC_MUX or IO_MUX. Is this true?

Are pins RTC_6 - RTC_9 affected by 3.6 bug too? And if so, which register (XTAL_32 / TOUCH) should I use for RTC pins 8 (XTAL_32_K_N / TOUCH8) and 9 (XTAL_32_K_P / TOUCH9) to work around 3.6 bug ( = set pullup / pulldown for GPIO_32 and GPIO_33)? Both registers allow setting up pullup / pulldown.

Thank you.

Image

WiFive
Posts: 3529
Joined: Tue Dec 01, 2015 7:35 am

Re: GPIO pullup / pulldown

Postby WiFive » Fri Apr 13, 2018 10:35 am

Yes. Yes. Official driver uses X32P/N.
https://github.com/espressif/esp-idf/bl ... #L149-L150

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