NHD-2.4-240320CF-CSXI#-F minimal wiring for power

Comments

4 comments

  • Saurabh_B

    Hey Jesse,

    I'm not seeing a connection from the backlight cathodes to ground, they seem like they're tied together but just floating.

    Other things I would change is having the Reset pin attached to the MPU because it does net to be toggled for the initialization. and it seems you're going to be using 8-bit mode, you want to use DB8 - DB15 (PINS 22-29) of the display.

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  • enjaian

    Hey Saurabh_B,

    Thanks for your help. I did leave the cathodes floating on accident, but when I connected them to the ground the screen still remained black. Does the microcontroller driving the LCD need to be initialized to power the backlight? Thanks for the advice on the parallel connection and Reset pinout too!

    Jesse

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  • Saurabh_B

    The backlight should turn on so long as you have the cathodes grounded and the anode tied to Vdd. I would measure the voltage across the cathodes and anode.

    With the tight area, I would recommend also checking to see if anything is getting shorted.

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  • enjaian

    Thanks! Got it working   There was a short I didn't catch tucked near the FFC.

    Best,
    Jesse

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