Difference between ICE and JTAG?

nesta · 05-06-2007, 09:23 AM

hi all,
i have read about JTAG and ICE at wikipedia site but i still confused about them and their functionalities?

1. JTAG is a way for debuging the software codes on embedded systems?
2.ICE is the hardware that do the process of this debugging?

please correct me if i m wrong?

3.can the JTAG connected between my pc and the embedded system, i mean there is no ICE at all and the debugging is done from my pc instead of the ICE? could this be happen or every JTAG is connected to the ICE?

thanks in advance.

nmh+linuxquestions.o · 05-07-2007, 06:57 AM

I presume you mean IEEE 1149.1 standard entitled Standard Test Access Port and Boundary-Scan Architecture and in-circuit emulator. I think the simple explanation is that ICE is for pretending to have hardware before you really have it (emulating a hardware component inside a circuit) while JTAG (IEEE 1149.1) is for communicating with hardware (it is a serial protocol).

I think debugging an embedded system with a "normal" computer counts as in circuit emulation or background debugging.

A few follow up questions for you:
- what are you working on?
- Do you now know more about the differences?

nesta · 05-07-2007, 11:04 AM

i dont know a lot of information but as u said or as i said:
ICE is hardware emulator while JTAG is the way of communication

i will buy a new arm kit and i just wanna know what is the difference between both exactly.
thanks in advance