Fuse bits for ATmega8

[rade908]

Hi, need me help.
I make programmer for AVR microcontrollers, with ATmega8.But I'm not sure whether I correctly set fuse bits. I am read datasheet but I don't understand fully datasheet. I am set low fuse bits 0xD9 and high fuse bits 0xE1. I using 12MHz quartz oscillator. Lock bits i don't touch and it is set as default at 0xFF.
Can someone tell me, am i set fuse bits correctly? If not set correctly, please tell me how to set.

 

[navenmou]

Hey i think you have set the fuse bits in opposite way...

This way is correct
LOW:0XE1
HIGH:0XD9

For more info please once check this link
Engbedded AVR Fuse Calculator

 

[rade908]

ok but what do I do with locked bits? if I leave them to be as default?

 

[alexan_e]

Why don't you use a programmer with a front end like ponyprog or AVR8 Burn-O-Mat , it will make your life easier.

Alex

 

[rade908]

I installed AVR8 Burn-O-Mat and think it will help me

 

[alexan_e]

Yes it is a nice front end to avrdude, I find it very convenient.
It just doesn't have security fuses so if want to change them you have to use a different way like command line of avrdude or a different program like ponyprog or even AVR studio (ISP or JTAG) if your programmer is supported.

Alex

 

[nandhu015]

Lock bits i don't touch and it is set as default at 0xFF.

The default setting (factory setting) of atmega 8 is not 0xff.

The default setting is Low value 0xE1 and High value is 0xD9.

Check that out..