Reset uno r3 Fuse bit registers

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1

Hello all.
I have a uno r3, I want to reset fuse bit registers.
Somebody knows how to do?
Thanks.

2

Do not cross-post. Other thread removed.

3

leoncorleone:
Hello all.
I have a uno r3, I want to reset fuse bit registers.
Somebody knows how to do?
Thanks.

you can set the fuses to anything you like using a programmer or a second UNO.
What do you mean by "reset"? What would you like the fuses to be? And WHY?

4

Thanks.How can I set the fuses with arduino.
Because I got a mistake , and have set the fuses on the external clock.
My atmega328p doesn't work anymore,Please I don't know how to recover my arduino's Micro.

5

Nobody is answer me, please. I am waiting for it. :frowning: :frowning: :frowning: :frowning: :frowning: :frowning:

6

Provide a clock signal to the XTAL1 pin. LadaAda has a version of ArduinoISP (available on GitHub) that provides a reasonable clock signal. I believe Nick Gammon also has something that provides a reasonable clock signal. Here is a version of Arduino ISP that can be configured to provide a reasonable clock signal: GitHub - Coding-Badly/TinyISP: ArduinoISP replacement with: Tiny Debug Knock Bang, Monitor, Tiny Tuner 2, and other amenities

7

leoncorleone:
Thanks.How can I set the fuses with arduino.
Because I got a mistake , and have set the fuses on the external clock.
My atmega328p dosn't work anymore,Please I don't know how to recover my arduino's Micro.

How did you do that? Whatever you did, put it back.

8

Actually I have set Arduino's micro fuse bits by anther programmer and avr studio soft.After that I couldn't program it.
So what should I do.......?
Thank you

9

It sounds like he set it to use external clock not external crystal. If you do this, you can't undo it the same way you did it, because now the chip has no clock, and so can't be programmed by ISP (without providing it with a clock signal).

Follow the instructions from Coding Badly: