turning off VDD_SDIO in deepsleep possible?

Oers_D
Posts: 2
Joined: Wed Apr 07, 2021 4:33 am

turning off VDD_SDIO in deepsleep possible?

Postby Oers_D » Thu Apr 08, 2021 10:16 am

Is it possible to turn off VDD_SDIO in deep sleep on a standard ESP32? (ESP32-D0WDQ6-V3)

By documentation this should do it, right?
esp_sleep_pd_config(ESP_PD_DOMAIN_VDDSDIO, ESP_PD_OPTION_OFF)

But cannot test it. PlatformIO development platform is a bit behind, where ESP_PD_DOMAIN_VDDSDIO has not been implemented yet.

ESP_Angus
Posts: 2344
Joined: Sun May 08, 2016 4:11 am

Re: turning off VDD_SDIO in deepsleep possible?

Postby ESP_Angus » Fri Apr 16, 2021 6:21 am

Hi Oers,

The support for ESP_PD_DOMAIN_VDDSDIO is actually to allow leaving it ON during sleep (particularly light sleep, if GPIOs are connected to it).

Do you find that VDD_SDIO is not powering down in deep sleep already? It should be (if the flash is also suspended, it may take a little while for the capacitors to discharge and the voltage to drop all the way to zero.)

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