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ARM microconvertor

  • 07-10-2004 01:05PM
    #1
    Rory7
    Closed Accounts Posts: 1 ✭


    Trying to interface an ADuC board to a standard Hitachi LCD.How can I read back 8 bits of data from the LCD.


Comments

  • #2
    Specky
    Closed Accounts Posts: 914 ✭✭✭Specky


    which "standard" hitachi lcd? They're all standard...every one of them...

    Is it a graphics lcd or just an alphanumeric?

    You need to get the data sheet for the lcd controller (the chip on the lcd that actually drives the display). Could be a SED1335.....maybe...or any one of a number of other controllers.

    Usually there's an 8 bit bi-directional data bus, an address bit (just the one), read and write strobes (active low), supplies and contrast control.

    The registers in the lcd controller are generally divided into data and control/status. There's often not a whole heck of a lot to read back from the lcd.

    You have to set the controller up correctly otherwise the display won't do anything. I had a few head scratchers with some LCDs that required pretty detailed setups to make them work


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