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Today is Sunday, tomorrow i will buy the capacitor 100pf and resitor 330 ohm....
I'm curious.....what's the configuration default (fuse bits) of the atmega8 just made from Atmel?
The atmega8 datasheet says :
"Problem Fix / Workaround
Use external capacitors in the range of 20pF - 36pF on XTAL1/TOSC1 and XTAL2/TOSC2.
This will be fixed in ATmega8 Rev. G where the CKOPT Fuse will control internal capacitors
also when internal RC Oscillator is selected as main clock...
I wrote and changed the fuse bits for this to 12 mhz :
**broken link removed**
I selected from https://www.engbedded.com/fusecalc : ext. RC Osc. 12 mhz
It's correct?
Best regards
I used in the first time an external crystal to 12 mhz and https://www.engbedded.com/fusecalc for the setting, i selected ext. RC Osc. 12 mhz . If i want to change the fusebits of the atmega8 for other use, the connection with the square generator is the only way?
There is no other way?
I use this ptrogrammer:
https://diy4fun.blogspot.it/2009/01/simple-serial-programmer-for-avr.html
I wrote an atmega8 without problems. When i change the fuse bits for an ext. RC Osc. 12 mhz (ckse0,1,2, ckopt, sut0 it's correct!), after i have connected the RC.osc 12 mhz with capacitors, but...
I have selected with precision this :
Ext. Crystal resonator high freq.; startup-time: 16K CK +64MS;[cksel=1111 SUT=11]
CKOPT= unprogrammed
The atmega8 datasheet is here :
http://www.atmel.com/images/doc2486.pdf
What do I look?
thanks
Giulio
alexan_e, thanks for the answer, but today i have blocked the atmega8!
I have selected cksel3 and not cksel1,2,0 for one distraction and it is not go.
Looking for your site i did this :
Hi, I am new in this forum
last time my ATMEGA8 has locked, and so i search how to unlock my...
Good morning at all.
I want built this:
http://www.cithraidt.de/joyadapter/index.html
I need to change the fusebits of the atmega8.
1) first i flash with hex files and only AFTER i change the fusebits?
2) When i have changed the fusebits (ext. rc. osc. to 12 mhz) , i can not do it...
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