[avrdude-dev] [bug #13125] ATMega169 efuse reserved bit

[anonymous]

URL:
  <http://savannah.nongnu.org/bugs/?func=detailitem&item_id=13125>

                 Summary: ATMega169 efuse reserved bit
                 Project: AVR Downloader/UploaDEr
            Submitted by: None
            Submitted on: Don 19.05.2005 um 15:50
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Christian Zietz
        Originator Email: 
             Open/Closed: Open

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Details:

According to the datasheet the least significant bit of the extended fuse
byte of an ATMega169 is reserved and should not be programmed. In the
corresponding write command in avrdude.conf this bit is marked as "ignore"
("x"). This causes the bit to be set to zero and thus the reserved fuse to be
programmed. Atmel confirmed that the programming of this bit affects the RESET
pin so that further SPI programming is not possible. I had to switch to JTAG
to reset this fuse bit.
I think the avrdude.conf needs to be corrected.






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