JTAG is Such a Universal Thing!

JTAG staretd as a means of testing complete systems. The standard has gone through some three revisions. And it has kept growing. Today no complex embedded system can do without it. Not only it is needed for getteing the testing to be done right but it is a major tool during development. his is the interface through which you work during development. Do the compiling of your software on a PC and download through the JTAG. Use your debug tools through the JTAG and make sure it is running properly. Typical development, debug scebnario is a PC connected to the target hardware board through the JTAG cable. This used to be far more complex situation with emulators and sophisticated logic analyzers and may be with disassembly of the bus transactions and so on!