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[Hardware] Question about GPIO3_D3_3V3 pin on Schematic Pico Pi ?
Posted: 2025-04-09 7:32
by quocan123
Hi, I am designing my own board using Core1106. I am following the Luckfox Pico Pi schematic and when I design the GPIO, I see the schematic has GPIO3_D3_3V3. Does that mean this GPIO can be used as 3V3 VCC or this pin can accept 3V3 input while the other pins can only be 1V8?
Thank you
Re: [Hardware] Question about GPIO3_D3_3V3 pin on Schematic Pico Pi ?
Posted: 2025-04-09 10:18
by Crocodile
Hello GPIO3_D3 Native is 1.8V voltage domain, we use MOS transistor to achieve level translation so that it can carry out 3.3V output and input, you can study the implementation of level translation circuit in detail
Re: [Hardware] Question about GPIO3_D3_3V3 pin on Schematic Pico Pi ?
Posted: 2025-04-09 10:40
by quocan123
Hi, thanks for reply. Can i ask more about this component in image. I want to use LCD but I cant find that component, so can I remove it and connect directly to FFC connector ?
https://imagekit.io/tools/asset-public- ... cw__%22%7D
Re: [Hardware] Question about GPIO3_D3_3V3 pin on Schematic Pico Pi ?
Posted: 2025-04-10 1:09
by Crocodile
The component you selected is the backlight constant current control module of the screen, and directly removing it will cause the backlight to fail to drive when using the LF40 screen
Re: [Hardware] Question about GPIO3_D3_3V3 pin on Schematic Pico Pi ?
Posted: 2025-04-10 1:11
by quocan123
Okay, thank you
