I just wanted to know how
can I generate a precise 1 hertz clock pulse.
Use a 74HCU04, two caps, two resistors, and a known-value crystal.
(Somebdy please refresh my memory on the name for this type of
oscillator? I think it starts with "F", but I'm not sure.)
Feed the output to circuitry that behaves as a "divide by <crystal
frequency> counter", and take your 1 Hz signal off of the output from
that. You may want to feed it to a schmidtt trigger to be sure it's nice
and clean before actually putting it to work, but I'd consider that an
optional improvement. Presto. Crystal accurate 1 Hz oscillator