keypad interfacing and full details how to interface

Discussion in 'Embedded Systems and Microcontrollers' started by baga, Jan 30, 2009.

  1. baga

    Thread Starter New Member

    Jan 30, 2009
    1
    0
    this is baga i have problem with interface of keypad i need information on how to interface 4x4 keypad with PIC16F877A.
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    What is the keypad's part number or where is the datasheet?
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    If you are referring to the typical 4 by 4 keypad, then you could use the "charlieplexing" approach.

    hgmjr
     
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