LilyGo TDisplay RP2040 needs PWR_EN pin

[Juanvelascoibarz]

I was no way to have something in screen with this board.
After struggling with it I found there wasn't 3.3v. at VDD ST7789 terminal.
So, following schematic I see it needs PWR_EN signal from RP2040 (GPIO22).
Then I try putting it to HIGH in arduino ide scketch example, this way backlight and screen can be active and works ok.
Someone having this behaviour with this board? . GPIO22 must be HIGH by default ?
I don't understand very well this behaviour.

Thank you for your help.

[Bodmer]

Yes, as you found out, that board has a power switch inline with the display power pin.

You have taken the correct approach of driving that pin high in the sketch.

I expect the switch has been added to allow the user to reduce power, when running on a battery, by allowing the display to be powered down.

[Juanvelascoibarz]

Good suggestion, solved my doubt.
Thank you very much!!