I use a stk200 for a 8515 projekt, and ISP works fine for the prototype, but in the produkt I only have a slow way to reset the chip, and then the stk200 don't work, bacause it make some short pulses app. 25 ms before reset goes low, and the program/programmer need that.
I looked shortly on the reset when a stk500 read the chip at it looks even worse !!! a lot of pulses
So do anyone have a simpel way to program a 8515 just after the data sheet ?