Steering Time for 8888 DTMF Receiver

Discussion in 'Embedded Systems and Microcontrollers' started by prevravanth, Jan 15, 2007.

  1. prevravanth

    Thread Starter New Member

    Dec 29, 2006
    8
    0
    Hi,

    I am developing Caller Line Indication (CLI) using 8888 DTMF Receiver and intefacing with 80C51 along with serial port.

    Now it is working with outgoing tones digits.

    But with incoming calls detection the digits are jumping and twice it displays.
    in the hyperterminal

    The problem is in the steering part where the RC time constant.

    can u suggest me the RC time constant.

    Please Help me.
     
  2. mrmeval

    Distinguished Member

    Jun 30, 2006
    833
    2
    We need a schematic diagram and parts list, not in word format please.
     
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