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JTAG/Boundary Scan
Hi,
I am a little confused by the PCI2.1 specification regarding
the JTAG/Boundary Scan signals.
I do not intend to support PCI JTAG. I am trying to figure out
what I should do with the JTAG pins.
Section 2.2.10 of the spec. says the following:
Expansion boards that do not support the IEEE 1149.1 interface should
hardwire the board's TDI pin to its TDO pin.
Section 4.3.3 says the following:
..if boundary scan is not implemented on the planar, TMS and TDI
should be independently bused and pulled up each with ~5Kohm
resistors, and TRST# and TCK should be independently bused
and pulled down, each with ~5K ohm resistors. TDO should be left open.
Do I need to implement pull-up/pull-downs as stated in 4.3.3 or can
I just hardwire TDI and TDO as stated in 2.2.10?
Reza Vahedi
rvahedi@cognex.com
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