Hi,
are you talking about ASIC or PLD design? If so then the thread should be moved there.
I want to asking that in sequential design what is the requirement of making the circuit clock dependent?
I guess you almost answered your question yourself.
The clock is the timing control for the sequencer.
A sequence is "a particular order in which related things follow each other". (accroding internet search)
Back to the school class:
The sequence on monday may be: physics, mathematics, sports, ...
But for the pupils and the teachers to know when each lesson starts .. the schedule needs a timing information.
(like: maths from 9:00 to 10:00)
And both pupils and teachers need a common clock to refer to.
The clock is the "timing source".
Electronics example.
Build a blinker for a car. 0.5s ON, 0.5s OFF (ON and OFF are the sequence, 0.5s is the timing information)
* Now in simplest case you may have a 2Hz clock. --> at one rising edge: ON, at the next rising edge: OFF
* or you have a 1MHz clock: 500.000 clock ticks ON, 500.000 clock ticks OFF
Klaus