Proteus Simulation- clock fuse bits

Discussion in 'Embedded Systems and Microcontrollers' started by rabhishek91, May 5, 2013.

  1. rabhishek91

    Thread Starter Member

    Feb 14, 2013
    Hi everyone. Today i was testing the Micro-controller simulation in Proteus.
    I built a circuit and loaded the .hex file. When i try to simulate it i got an error.

    "CKSEL fuse bits specify external oscillator but no clock frequency is specified"

    I have used 12MHz crystal and selected external clock source but it isn't working. However, if i select internal clock option ,everything works fine.
    Please correct me.:confused:

    I am unable to attach the files to the thread. Please help me
  2. absf

    Senior Member

    Dec 29, 2010
    On ISIS open your DSN file. Use Edit>Copy to clipboard,

    Open microsoft "PAINT", paste your picture and save as .PNG file then you can post it here.

  3. t06afre

    AAC Fanatic!

    May 11, 2009
    You can also create a zip file of your project , and post the zip file. However not everybody do have Isis proteus installed. I prefer pdf files. And I use this free tool a lot