Locked U6, ATmega48PA, after programming fuses

[deanw]

Hello,

I tried to update the U6 firmware in my FG085. I have an Atmel ICE debugger. Programmed the memory OK. It was a bad idea, but I decided to program the fuse bits and it locked up. I've ordered a new part to install on the board.

The fuse bits listed in my manual:

1) ATmega168PA(U5)
Extended Fuse Byte: 0b00000111 ( 0x07 )
High Fuse Byte: 0b11010110 ( 0xD6 )
Low Fuse Byte: 0b11100110 ( 0xE6 )
2) ATmega48PA(U6), which is the DDS core.
Extended Fuse Byte: 0b00000001 ( 0x01 )
High Fuse Byte: 0b11010110 ( 0xD6 )
Low Fuse Byte: 0b11100000 ( 0xE0 )

Are these still correct fuse setting for the following firmware?
113-08502-053 U6
113-08501-132 U5

Any advice on programming U6 after I install the new part?

Thanks, Dean

[jye1]

Yes the fuse bits remain unchanged for the new version firmwares.