16 Nov
2011
16 Nov
'11
9:05 p.m.
Sridhar Ayengar wrote:
What happens if you try to, say, define a clock
signal,
assign the pins to it, cable it up to a crystal, and then
never connect it to any logic? I mean, yeah, you'd be
out a couple of pins, but does it work?
Works fine. The tools will warn you that you have an unused signal.
It won't solve any complaints that tools may produce regarding not
having a clock. However, I've never seen such a complaint from the
Xilinx tools.