AMegas 16 JTAG ISP Question

Go To Last Post
2 posts / 0 new
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Hello
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.
Thank you
Don

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

The ATMega16 comes with the JTAG enabled so yes, you can program the the device through this interface. Take care not to accidentally clear this fuse bit whenever you are programming other fuses.

Dave