[dil6222]

Yes it should be same
as all xprog
regards

i think too.. because its the same atmega64.. but  im looking for someone who had experience on this version..

relly they are the same mcu the only difference with 5.84 is firmware that is programmed into mcu is different 

do you have any procedure to do it?.. thanks

Yes follow the guide above but you need the new 5.84 firmware file which I doubt is freely available anywhere yet so the only option is buy a repair chip with the firmware on or flash 5.55 firmware

[carmageddon1970]

Hello all this should help users who have locked atmega64 on xprog and can not read or program chip anymore. 100% way of unlocking after hours/weeks of research and testing.

This is done off board with qfp64 breakout board should be able to  program onboard xprog also though.


easy fix all you need is:

1. UPA PROGRAMMER 

2. USBASP WITH SLOW CLOCK JUMPER ON  
     EXTREME BURNER SOFTWARE AND 10 TO 6PIN ADAPTER 

3. JUMPER WIRES FEMALE AND MALE

4.QFP64 BREAKOUT BOARD 

let's get started

 1.     First of all connect jumper wires between atmega and usbasp
       you will need to split vcc + into 3 wires and gnd - into 3 wires 

Connect vcc+ to pin 21,52 and (64 i believe optional as for avcc i test later) 

Connect gnd- to pin 22,53 and 63 

Connect SCK to SCK

Connect RESET to RESET

MOSI to PE0    (common problem is people using PB2 and PB3 as there listed as mosi and MISO but they are not )

MISO to PE1 

You should end up with something like this you can see I've split the and vcc 




2.   Next connect PIN2  from UPA DB9 SOCKET to XTAL 1.

Now connect everything else usbasp and upa to usb etc 



Now comes the fun bit 

3.   Open upa go on tools then pulse generator and you will see this:



Change frequency to 1000khz and click start and leave it running.



 4. Open extreme burner avr and go to fuse settings tab and click on read 
        atmega should connect as normal



5. Go on each set of fuses low, high, extended lock go on bit details and click load default value for each set
   Then tick all the write boxs and click write.   or you can manually enter the following  
(  Low E1,  HIGH 99, EXTENDED FD, LOCK FF then click write these are factory lockbits. see photo



6. Go on low fuses and check the following clksel settings are  there

Cksel0   (1)
Cksel1   (0)
Cksel2   (0)
Cksel3   (0)



Now erase chip and then disconnect upa 

That's it all done it should be able to program/ read as normal without upa sending signal to xtal1 on mega.


 Hope this helps many  CT members to unlock atmega 64 so it can be reused not tossed into the bin 

I've spent many hours tearing out my hair to bring this guide so PLEASE leave thanks and rep if it helps 

Many thanks dil6222

hi

i need to relive this thread

i buyed chip 6.26 and chip 6.12, test adapter qfp64, i did all with same tools (usbasp+avr burner and upa) and respecting all instructions but what come out from reading is bad...eep 5.35 kb and flash 180 kb...and eep + flash have inside same strings repeated for all lenght of file...can you explain better what i'm wrong? eep must be 2 kb and flash 64 kb

[domelec]

i think you have misunderstood what this is all about
this is to unlock the atmega so you can reprogram it
it is not for you to unlock so you can read the contents