Lpc2000

>> >JTAG and debug are NOT the same. For those who are educated the
 >> meaning of the word debug is made clear by the context. In the
 >> context of CRP, debug clearly means enabling the debug bus signal to
 >> act, which JTAG, if enabled, may be attempting to assert. Lack of
 >> real educated insight is giving rise to confusion that should not
 >> exist and I should not be expected to clarify, particularly to those
 >> who claim or imply expertise. Clearly debug can also mean JTAG, but
 >> in a different context.
 >>

As far as Philips LPC2xxx chips are concerned, debug and JTAG _are_ the 
same.
There's no boundary scan implemented on the LPCs, only the debug scan 
chains
that are part of the ARM7TDMI-S core. When CRP is enabled, JTAG/Debug 
doesn't
work. <<

Actually, for once, I can see John's reasoning. The way I understand it. 
the JTAG is just the interface, which happens to carry the signals from 
the debug unit. It could be called the Philanium Doggle Whack interface 
and have a 1,000 bit wide interface, but still be carrying the same 
debug information. It's possibly like calling TCP/IP Ethernet. Just 
because Ethernet normally carries TCP/IP doesn't mean it always is.