1. chandu13

    Thread Starter Member

    Oct 15, 2008
    22
    0
    Hay

    I interfaced LPC2114 with PCF8574.
    From the data sheet The I/Os should be HIGH before being used as inputs.
    How to make PCF8574 as the Input port to read the external inputs.

    Regards
    chandu
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
    282
    Read page 12 of the data sheet again.
     
  3. chandu13

    Thread Starter Member

    Oct 15, 2008
    22
    0
    From the data sheet 0=Write,1=Read

    if i write Startbit+Slave Address+0 then the Port become output port

    if i write Startbit+Slave Address+1 then the Port become input port

    Regards
    Chandu
     
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