RE: "fastest cclock" definition

John,

I guess your intent was:

If the user instantiates a 1/1 cclock without a don't care duty cycle,
then
that becomes the fastest clock in the system, although it limits
performance
to be only half as fast as the uclock, since in this case, both edges
must be
scheduled on posedges of uclock.

I removed the 'with' before without. Please take a look.

Shabtay

________________________________

If the user instantiates a 1/1 cclock with without a don't care duty
cycle, then
that becomes the fastest clock in the system, although it limits
performance
to be only half as fast as the uclock, since in this case, both edges
must be
scheduled on posedges of uclock.

The fastest cclock is also the basis for cycle stamping (see section
5.4.5.3 of
scemi-108.pdf). The cyclestamp will always be the number of fastest
cclock
cycles since reset.

In more complex systems that require multiple clocks ...

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-- johnS

______________________________/\/ \ \
John Stickley \ \ \
Principal Engineer \ \________________
Mentor Graphics - MED \_
17 E. Cedar Place \ john_stickley@mentor.com
Ramsey, NJ 07446 \ Phone: (201) 818-2585
________________________________________________________________
Received on Fri Jan 21 17:02:47 2005