Instructables

ATtiny pin low during programing

When an ATtiny2313 gets programmed using an Arduino as an ISP, if pins #4 and 15 are held low during programming will it effect the the program. Or will the program be loaded correctly and work correctly irregardless.

Use the blink sketch for an example.

It should be fine. You'll only have a problem if the circuit is interfering directly with the programming data/clock pins, and you may need to watch out for voltage being applied to the reset pin by the programmer.
+1
WWC (author)  steveastrouk2 years ago
Well this is good, Simplifies my board.
WWC (author) 2 years ago
Thank You Very Much!