bugAVR Downloader/UploaDEr - Bugs: bug #13125, ATMega169 efuse reserved bit

 
 

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bug #13125: ATMega169 efuse reserved bit

Submitter:  None
Submitted:  Thu 19 May 2005 03:50:05 PM UTC
   
 
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  Fixed Privacy:  Public
Assigned to:  bdean Originator Name:  Christian Zietz
Originator Email:  -email is unavailable- Open/Closed:  Closed
Release:  None Programmer hardware: 
Device type: 

Wed 14 Sep 2005 02:16:26 AM UTC, comment #1: 

Changed 'x' specification (ignore) to 'i' (input) allowing the developer to preserve or change the bit as desired.

Brian Dean <bdean>
Group administrator
Thu 19 May 2005 03:50:05 PM UTC, original submission:  

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.

Anonymous

 

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Follow 4 latest changes.

Date Changed by Updated Field Previous Value => Replaced by
2005-09-14 bdean StatusNone Fixed
    Assigned toNone bdean
    Originator Email x
    Open/ClosedOpen Closed

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