In fact I was asking two question at same time. I didnt mean that JTAG interface with AT89S*. With any other device that supports it.

>Most[1] derivatives that have JTAG use it in >conjunction with on-chip debug hardware precisely so >that you do not need an ICE!

If no nedd for ICE how ll I connect to the board.

I was looking for a device (and emulator) where I dont have to use socket interface debugging because where I ve to put my card I dont have enough provision that I can put my emulator socket on the board.

meanwhile I ve seen silabs website and they ve many device and development kit which support what I m looking for. any suggestions how r they?

Thanks,