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From: skyworld on 23 Jan 2007 04:09
Hi,

when I use ISE8.2 to do synthesis and P&R for my fpga (Virtex 4)
design, I got such message:

WARNING:XdmHelpers:662 - Period specification
"TS_u_DigRF_top_u_v4_clkgen_clk26_buf" references the TNM group
"u_DigRF_top_u_v4_clkgen_clk26_buf", which contains both pads and
synchronous
elements. The timing analyzer will ignore the pads for this
specification.
You might want to use a qualifier (e.g. "FFS") on the TNM property
to remove
the pads from this group.

Does anybody knows what it mean and how to solve it? thanks very much.

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