bugAVR Downloader/UploaDEr - Bugs: bug #30756, When setting SUT to 64ms on XMEGA,...

 
 

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bug #30756: When setting SUT to 64ms on XMEGA, avrdude doesn't read device signature

Submitter:  Simone Zamboni <zsimon>
Submitted:  Thu 12 Aug 2010 10:18:06 AM UTC
   
 
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  Fixed Privacy:  Public
Assigned to:  joerg_wunsch Originator Name:  Simone Zamboni
Open/Closed:  Closed Release:  None
Programmer hardware:  Device type: 

Fri 20 Apr 2012 12:34:25 PM UTC, comment #1: 

Fixed in SVN r1084: when the signature reads out as 0x000000
or 0xffffff, up to two retries (with progressive delays) are
attempted before proceeding.

Joerg Wunsch <joerg_wunsch>
Group administrator
Thu 12 Aug 2010 10:18:06 AM UTC, original submission:  

I'm using avrdude 5.10 with AVRISP mkII on USB.

In my last project I set up device SUT (start up time) to 64ms to let the power supply settle. I found that invoking avrdude it reports that the device signature is 0x000000. I can bypass the error with -F option but I think that the problem could be easy to fix inserting a 100ms delay before reading the device after it has been reset.

Device SUT is available for XMEGA devices in the fuse bits.

P.S. With SUT of 4ms, avrdude reads the device signature correctly.

Simone Zamboni <zsimon>

 

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    Follow 4 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2012-04-20 joerg_wunsch StatusNone Fixed
        Assigned toNone joerg_wunsch
        Open/ClosedOpen Closed
    2010-08-12 zsimon Carbon-Copy- Added -email is unavailable-

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