Thanks for reminding me of that. I once had that happen to me too. However, I just ran some tests and it’s not the case here. I disconnected the programmer and turned off the board power. I then removed the serial lines (leaving the GND connected to the adapter) and re-connected them. No bytes came out and it did not respond to switch changes, so I assume the processor was (correctly) not powered on. Turn on the board power and it does respond to switch changes but, as before, no wake-up byte.
Steve
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf Of n1ist@comcast.net
Sent: Friday, December 13, 2013 3:59 PM
To: AVR-Chat@yahoogroups.com
Subject: [AVR-Chat] RE: initial flash programming run versus subsequent runs
Are you certain that you are powering off the processor? I had a board that happily ran without power as long as the rx line was connected to the PC; it was powering the processor through the ESD protection diodes on the chip...
/mike