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I have a Hyperpixel 4.0 Touchscreen, which i use one my Raspberry PI 3b+ This Touchscreen is attached directly on the 40 GPIO-Pins and a few Pins have some special Alt-modes. I analysed the alt Modes with following Result: enter image description here

And the GPIO description of the Touchscreen is following: enter image description here

I especially want to know, how the Data streams work, which do not have the ALT2 Mode. These Pins are BCM Pins 27,10,11,19,26,18,

For example BCM Pin 18 is "LCD Chip select", which in my opinion has to be an Output of the raspberry pi. But the GPIO analysis says, that this GPIO is configured as an Input. How do these Pins work? And for my personal Interest: How fast is the Data speed on these pins?

Thanks

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  • Are you sure these pins are even used for your display?
    – PMF
    May 19 at 8:20

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