Hi Harishankar
Ofcourse, you can read the processor register and do many more stuff via
JTAG. That is provided you know the private JTAG instruction of the
processor on Assabet (ARM ?). This private instruction set is usually not
disclosed by the processor vendor in their Boundary scan description
language (BSDL) file.
Thanks
Ganesh
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Harishankkar
Sent: Friday, March 01, 2002 5:46 AM
To: [EMAIL PROTECTED]
Subject: Some Questions on JTAG
Hi all,
After reading the JTAG code for Assabet I understand that once
the boundary scan interface is entered via extest function the whole board
as
a whole becomes a slave of the JTAG controller. That is the core loses its
functionality and becomes dummy and the JTAG controller has the entire
rights
for all the pins. Now I would like to know that whether it is possible to
control the core operations via JTAG? That is is it possible to read any
processor registers?
Thanx in adv,
Harishankkar
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