Den 2021-05-29 kl. 16:56, skrev Jeff Epler:
On Tue, Apr 06, 2021 at 09:05:51PM +0100, andy pugh wrote:
I wonder why the output pin of flipflop.comp is of type io?
Perhaps it was intended for a specific purpose?
flipflop only drives a value onto its output when it is clocked or when
its set input is true. The theory was probably that there was some way
to make other state-holding elements out of this, such as an SR-latch.
It change output value at positive flank but drive all the time. May
also be forced high or low according to manual.
I have no idea whether this is used.
Hard to tell if it is used anywhere but is one of the basic building and
it may be useful then there is a need to sample/clock a value on rising
edge though there may be a few others to chose from.
Nicklas Karlsson
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