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Hi everybody, just a quick question.
Can the PowerPC in a Virtex II Pro, be routed to control the JTAG
hardware? By that I mean provide instruction and data to the TAP
Thanks!!
Is this really true? I thought the only way you could drive the JTAGYes. There is an internal JTag tap that can be "tapped into" If you want to
use the PPC Jtag you have to use the internal tap symbol.
"Steve Casselman" <sc_nospam@vcc.com> wrote in message news:<MEjRb.16624$un.13640@newssvr27.news.prodigy.com>...
Yes. There is an internal JTag tap that can be "tapped into" If you want to
use the PPC Jtag you have to use the internal tap symbol.
Is this really true? I thought the only way you could drive the JTAG
pins was with external connections from other IO pins. The only
reference I could find to JTAG tap is the way the PPC taps into the
JTAG instruction register so the length doesn't vary depending on
whether the PPC is used or not.
Could you cite a reference?
Alan Nishioka
alann@accom.com
Right, but I think the OP was asking if you could *drive* JTAG fromPage 260 of the PowerPC Processor Reference Guide covers JTAG for the
405PPC.
Austin Lesea <austin@xilinx.com> wrote in message news:<bvc7np$eer1@cliff.xsj.xilinx.com>...
Page 260 of the PowerPC Processor Reference Guide covers JTAG for the
405PPC.
Right, but I think the OP was asking if you could *drive* JTAG from
the PPC and I didn't think this was possible (w/o external
connections).
I want to do this so I can update flash using JTAG and the internal
PPC.
Alan Nishioka
alann@accom.com