AVR-Chat

On Nov 7, 2010, at 6:02 AM, ecros_technology wrote:

> --- In AVR-Chat@yahoogroups.com, David Kelly <dkelly@...> wrote:
> 
>> ... You have to have the ISP to
>> put the chip in JTAG mode.
> 
> This is not true.  The ATmega32A will program and debug at the JTAG interface as delivered by Atmel.  So will all the other JTAG-capable devices of which I am aware.  JTAG is not a "mode".
> 
>> ... You have to have the ISP to
>> recover from certain goofs you
>> can do in JTAG mode.
> 
> The only goof you can make that will lock you out of the JTAG port is to disable JTAG by clearing the JTAGEN fuse.  This is an easy goof to avoid, unlike the infamous clock fuse goofs.

Thats what I get for posting without recently checking the datasheets.

What I said is true for DebugWire, but the part in question isn't DW.

--
David Kelly N4HHE, dkelly@HiWAAY.net
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Whom computers would destroy, they must first drive mad.