AVR-Chat

--- In AVR-Chat@yahoogroups.com, John Samperi <samperi@a...> wrote:
> Meanwhile back at the range...something happened by enabling
> disabling OCD and JTAG on the M64. The LED now flashes correctly
> even without jtag or programmer plugged in i.e. as it should.
> The question remains: Why is it so! Why is the timer now working
> as it should? Anyone has any ideas? No I haven't changed anything
> in the code, just played around with the 'fully working' jtag.
> 
> By the way Dave, I learned from your problems with the Int vectors
> last week and copied and pasted them directly from the M64 PDF
> into my code. :-))
> 
> Regards
> 
> John Samperi
John,

I havn't played with the JTAG on AVRs,but I have with CPLD's. I know 
that CPLD's can play strange games if some of the JTAG pins are left 
unconnected (floating) even if they aren't being actively used. Seems 
to work fine on the bench with the dongle hanging from it but soon as 
it is left to it's own devices intermittant random events can and do 
occur.

Just wondering if something similar is happenig with oyur board. 

Rgds

Stefan