Question

Digital Logic Design help anyone.

Answer 1

Well the S-R latch is quite understandable for me and how it works.This IC has four flip flops but two of them have two S-S1 and S2 namely.Which is confusing me.

Answer 2

Are you guys gonna help? :p

Answer 3

me no :P

Answer 4

There are two flip-flops that take two S signals. Both S signals must be H for the flip flop to work. I think people use the second S signal as a "clock enable"
in other words, if you have a clock that sends out a pulse at some rate, and you put signals on the flip flop, it won't "do its thing" until the clock pulse arrives.

Answer 5

according to
http://www.electronics-tutorials.ws/sequential/seq_1.html

it can be used to make a debounce circuit