Locked ATMEGA8

Discussion in 'Embedded Systems and Microcontrollers' started by allahjane, Dec 15, 2012.

  1. allahjane

    allahjane Thread Starter Member

    Sep 19, 2012
    hello there

    I have a ATMEGA8 that I flashed with a AVR programmer. I think I messed up some of the Fuse bits unintentionally .

    Now the the code I had flashed runs fine (without any external crystals) but I cannot re-flash (reprogram) the that microcontroller.
    the programmer just refuses to identify anything is in its socket!

    No, the programmer is okay as it can program other MCUs.

    I am assuming I may disable the Serial programming interface of the MCU

    If you think there could be some other problem please notify me.

    is there anyway i can re-program the MCU to be used again?
  2. MrChips

    MrChips Moderator Staff Member

    Oct 2, 2009
    The short answer is NO.
  3. bug13

    bug13 Active Member

    Feb 13, 2012
    The Hobbit Island (NZ), UTC +12
    Try high voltage programming, but if you don't have the high voltage programmer easily available, I would just buy another chip.

    from http://en.wikipedia.org/wiki/Atmel_AVR
  4. hgmjr

    hgmjr Moderator Staff Member

    Jan 28, 2005
    Tennessee, USA (GMT-6)
    I agree with bug13. I have experienced the occasional setting of a fuse that rendered the AVR that I was using to become temporarily unprogrammable. The high voltage parallel programming (HVPP) approach has always allowed me to recover.

Similar Threads
Forum Title Date
Embedded Systems and Microcontrollers Possible my AT91SAM7X is locked. How to Release? Dec 12, 2009
Embedded Systems and Microcontrollers "locked" PIC Jul 18, 2008
Embedded Systems and Microcontrollers millis() function for Atmega8 Sep 22, 2014
Embedded Systems and Microcontrollers Output shoes constant values from MPU-6050 on Atmega8 via I2C? May 28, 2014
Embedded Systems and Microcontrollers PWM adc ADC not running simultaneously on ATmega8 May 18, 2014

Share This Page