I'm designing a micro controller circuit. It will be using the ATMega16 pdip with 8 optocoupler to isolate input data.
Also a ULN2803A will be used on a port to drive external things too.
I'm wondering if you can program the flash with JTAG connector? I have the JTAG-ICE. If my optocouplers are on the same port as the ISP pins will ISP still work?
Will I need resistors?
This is my first project with a ATMega. I have been using the AT90S2313 and the 8515. I'm looking for some ideas.