microcontroller ckt not working

Discussion in 'Embedded Systems and Microcontrollers' started by pradeep koderi, Nov 14, 2011.

  1. pradeep koderi

    Thread Starter New Member

    May 31, 2008
    5
    0
    hi,

    any one can help me with atmel 89C2051 hardware circuits??

    thanks
     
  2. RiJoRI

    Well-Known Member

    Aug 15, 2007
    536
    26
    Probably.

    --Rich
     
  3. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    Post your circuit diagram so we can see what you have come up with so far.

    hgmjr
     
  4. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    would love to help, have a couple sitting on my desk right now. But you need to get serious about helping us help you, otherwise, stop wasting our time.

    First things first, lets assume your circuit is functioning and that your using Atmels flip. Tell us if you can read the device status registers. If you can't, FULLY describe your physical interface between PC and device.
     
  5. pradeep koderi

    Thread Starter New Member

    May 31, 2008
    5
    0
    thanks for reply.
    please find the attached drawing for your referance.
    Program written in C language using Keil.
    Present problem is with the controller output pin.
    All the output pin are in high state.
    Tried to reset many times and checked the quartz crystal.Seems to be working.

    Any suggestions in this regard??
     
  6. pradeep koderi

    Thread Starter New Member

    May 31, 2008
    5
    0
    thanks for reply.
    please find the attached drawing for your referance.
    Program written in C language using Keil.
    Present problem is with the controller output pin.
    All the output pin are in high state and the present state were not changing.
    Tried to reset many times and checked the quartz crystal.

    Any suggestions in this regard??
     
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