VDET control pins

edwardwhite
Posts: 2
Joined: Wed Aug 24, 2016 1:09 pm

VDET control pins

Postby edwardwhite » Fri Aug 26, 2016 10:29 am

Hey, does anyone know what VDET1 (pin 10) and VDET2 (pin 11) do?
Their function is not in the datasheet and they are left floating on the ESP-WROOM-32 :?

ESP_Sprite
Posts: 8921
Joined: Thu Nov 26, 2015 4:08 am

Re: VDET control pins

Postby ESP_Sprite » Fri Aug 26, 2016 12:00 pm

They are general RTC-domain inputs. You can use them as GPIO (well, they're input only, so GPI) or connect them to an ADC.

edwardwhite
Posts: 2
Joined: Wed Aug 24, 2016 1:09 pm

Re: VDET control pins

Postby edwardwhite » Fri Aug 26, 2016 12:28 pm

And what are general RTC domain inputs? :oops:

ESP_Sprite
Posts: 8921
Joined: Thu Nov 26, 2015 4:08 am

Re: VDET control pins

Postby ESP_Sprite » Fri Aug 26, 2016 4:35 pm

Well, they belong to the RTC power domain, which means that the devices that fall under the RTC can control them. It means e.g. that they can be used as ADC pins and that the ULP coprocessor can read them. Apart from that, they can also be used as normal GPIOs and when the CPU is on, they can be routed as inputs to most peripherals over the GPIO mux. They can't be outputs though, input only.

willz1200
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Joined: Tue Oct 30, 2018 4:28 pm
Location: United Kingdom
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Re: VDET control pins

Postby willz1200 » Tue Oct 30, 2018 4:35 pm

Please can you explain in more detail?

Does this mean that VDET_1 and VDET_2 can be used as ADC inputs or digital inputs by the ULP co-processor, but all the other RTC_GPIO can only be used as digital inputs by the ULP co-processor.

Thanks,
Will

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