AT89C2051 ROM extention

Discussion in 'Embedded Systems and Microcontrollers' started by hadeedunhaad, May 11, 2011.

  1. hadeedunhaad

    Thread Starter New Member

    Apr 22, 2011
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    hi all ,
    Is it possible to extend the program memory (ROM) of AT89C2051 which comes with a default internal ROM of 2K ? I'm aware that in 8051 (40 pin) its possible to use an external ROM by the use of PSEN. But i cant find the same in 2051.
     
  2. GetDeviceInfo

    Senior Member

    Jun 7, 2009
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    external data or program memory is not supported in this device.
     
  3. hadeedunhaad

    Thread Starter New Member

    Apr 22, 2011
    24
    0
    Thank you, k then it seems like i'll have to go for the 40 pin version. It's mamoth.
     
  4. GetDeviceInfo

    Senior Member

    Jun 7, 2009
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    230
    would the 4051 work?
     
  5. hadeedunhaad

    Thread Starter New Member

    Apr 22, 2011
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    yeah ! right now i'm doing with that.. though it looks little bit odd in the circuit due to its size when compared to other chips.
     
  6. GetDeviceInfo

    Senior Member

    Jun 7, 2009
    1,571
    230
    20 pin soic, same as the 2051
     
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