Re: [avr-gcc-list] uisp erased atmega103 id bytes!

[David Breeze]

Hi

I have had devices apparently die when serial programming,  The only solution I 
have found, to bring them back to life, is to use a parallel programmer, in my 
case the STK500 board or for some parts the dataman (a commercially available) 
programmer.

DaveB


>>> address@hidden 03 July 2002 11:31:57 >>>
"Francisco T. A. Silva" <address@hidden> wrote:

> After that the id bytes became 0xff,0xff,0xff and it allways fail
> verify!

It's a well-known problem that it can sometimes happen to destroy the
ID bytes in serial programming.  Atmel acknowledges this in appnote
910, page 5:

``Table 5 indicates that the Device Code will sometimes read as $FF.
If this happens, the part Device Code has not been programmed into the
device.  This does not indicate an error, but the part has to be
manually identified in the programmer.''

(Is it even possible now in UISP to manually define the part?  Last
time i looked it wasn't.)

I've also seen it to respond with 3 * $00 on one part.  In all cases
however, the device still worked.

Maybe you've killed it somehow else?
-- 
J"org Wunsch                                           Unix support engineer
address@hidden        http://www.interface-systems.de/~j/ 
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