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  1. #1
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    40 pin TFT Backlight turn up

    Hello all,

    Thanks for your previous input on Oscillator Circuit.
    I am making a proto-board, which i have done taking base board design from Stm32f429zit6 Discovery Board.
    I am using a different tft from that of Discovery board.

    Right now i am validating all peripherals, I am facing issue in turning on the TFT backlight.
    As to the pin diagram i have supplied 12 Volts, and also supplied 3V3 volts and GND to respective pins.
    But still TFT is not turning on. I also see DISP pin , i am not sure whether that pin needs to be pulled high to turn on the backlight.
    I even tried that, but didn't work out. Any ideas what wrong could i be doing.
    Please help
    Datasheet -> https://drive.google.com/file/d/0B2z...ew?usp=sharing
    I also connected it to my RPI and it works.
    What wrong i am doing.

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  2. #2
    Advanced Member level 5
    Points: 24,069, Level: 37
    barry's Avatar
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    Re: 40 pin TFT Backlight turn up

    If you actually read the data sheet youd see that you need 24 volts for the leds



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