ESP32 Forum

Posted: **Thu Jun 15, 2023 12:30 pm**

HI
In the datasheet it states

As the VDD_SPI voltage of the ESP32-S3R8V chip has been set to 1.8 V, the working voltage for
GPIO47 and GPIO48 would also be 1.8 V, which is different from other GPIOs.

As I read this it suggests that I can still use them as GPIO however their voltage will be 1.8v.

Can someone confirm this please.

I have a chip with an enable pin I can switch at this voltage so I can use them if it is true.

Posted: **Fri Jun 16, 2023 1:51 am**

Yes, I can confirm this.

Posted: **Fri Jun 16, 2023 2:26 pm**

ESP_Sprite wrote: ↑
Fri Jun 16, 2023 1:51 am
Yes, I can confirm this.

Thanks that's all I needed.

Posted: **Sun Jun 18, 2023 4:35 am**

ESP_Sprite wrote: ↑
Fri Jun 16, 2023 1:51 am
Yes, I can confirm this.

I had a friend ask if they where 3.3v tolerant and I replied

AFAIK they are not 3.3 v tollerant as they are connected to the internal SPI voltage and as such feeding in 3.3v would probably fry the psram

Is that case?
Is my presumption correct?

Posted: **Sun Jun 18, 2023 9:17 am**

Yeah, I wouldn't put 3.3V on them indeed.

Posted: **Mon Jun 19, 2023 10:46 am**

ESP_Sprite wrote: ↑
Sun Jun 18, 2023 9:17 am
Yeah, I wouldn't put 3.3V on them indeed.

Sort of makes sense really.
Thanks I'll let him know.

ESP32 Forum

ESP32-S3WROOM 2 GPIO pins 47 and 48 1.8v can they still be used as GPIO

ESP32-S3WROOM 2 GPIO pins 47 and 48 1.8v can they still be used as GPIO

Re: ESP32-S3WROOM 2 GPIO pins 47 and 48 1.8v can they still be used as GPIO

Re: ESP32-S3WROOM 2 GPIO pins 47 and 48 1.8v can they still be used as GPIO

Re: ESP32-S3WROOM 2 GPIO pins 47 and 48 1.8v can they still be used as GPIO

Re: ESP32-S3WROOM 2 GPIO pins 47 and 48 1.8v can they still be used as GPIO

Re: ESP32-S3WROOM 2 GPIO pins 47 and 48 1.8v can they still be used as GPIO