Please help me EXT.CLOCK STARTUP????????

I have modified an atmega 328p fuse And I choose this option
:confused: EXT.CLOCK STARTUP TIME PWRDWN/RESET6CK/14 CK+65 :confused:

But I cant program it like before

  • What's the solution?
  • What does this mean?
  • What's the solution?
  • Did I kill Atmega 328p?

Did you have a external crystal or clock source connected to the CLK/XTAL pins of your Arduino? Is this a custom Board?

You have to connect ext. clock source or crystal to the ATmega. ATmega cannot start without the clock and of course, it cannot be programmed also.

If you have a second ATMEGA328, save the non-working one for later. If you insist on fixing it, you need a clock source as Budvar10 pointed out. If you don't know how to generate something around 1MHz, it's pointless. Just use a new chip for now until you get another arduino and know how to get it to output some square waves with timers.

Or, in desperation, if all that doesn't help, a high voltage programmer to reset the chip to a factory condition.

6v6gt:
Or, in desperation, if all that doesn't help, a high voltage programmer to reset the chip to a factory condition.

oh thank you so mush i use the Arduino and som circuit and i reternit to life

thank

thank you all
I fixed the problem