Maximun Cable Length for PIC to LCD

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  1. - 28th November 2007, 21:16 #6
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    Ioannis
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    Quote Originally Posted by Darrel Taylor View Post
    ....
    2. PBP sends everything out to the LCD at the MINIMUM pulse widths defined in the HD44780 datasheet. Which means approximately 1 Mhz squarewave signals since the enable pulse only lasts 1 uS. That's going to be tuff to get through 20 feet of ribbon cable.

    ....
    Well in this case, I would suggest to use double the number of flat cable wires and the middle ones connected to the ground point. It won't eliminate the problem but will help for sure.

    Ioannis
    Last edited by Ioannis; - 28th November 2007 at 21:19.
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