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Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Wed Dec 02, 2015 7:03 pm
by mightyohm
Can you explain what you mean by "Then I am put it in socket and try to re-burn"?

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Thu Dec 03, 2015 9:47 am
by dale
I mean I am not remove the 328p form socket, then press the button to read the fuse again.

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Thu Dec 03, 2015 10:19 am
by mightyohm
You need to remove the 328P from the socket between fuse writing operations. Can you try removing it from the socket before you attempt to burn the fuses again?

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Thu Dec 03, 2015 9:37 pm
by dale
I have to do it according to your step, but fuse always is 0xFF when first read. maybe these 328P are damage?

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Thu Dec 03, 2015 11:27 pm
by mightyohm
That is strange. Do you have another 328p you can try?

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Fri Dec 04, 2015 8:37 am
by dale
I just have two 328P of DIP package now, when I get new 328P, I will try it again.

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Sun Dec 13, 2015 4:41 pm
by mightyohm
OK, please post any updates.

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Fri Jan 01, 2016 1:58 am
by dale
Hi mightyohm,

I got new 328P, and it always have error, so I trace the PCB,
then find a trace not connect to 328P pin15, so it read/write has error.

This is my problem, because this PCB is make by me.

Thanks your help.

Re: Troubles with ATtiny85 fuses = 0xFF

Posted: Fri Jan 01, 2016 12:07 pm
by mightyohm
glad to hear you got it sorted out! :ugeek: