This block describe the simplest and the most fundamental latch
the SR flip flop. Where S and R are the input and Q and !Q are the
outputs.If S (Set) is pulsed high while R is held low, then the Q
output is forced high, and stays high when S returns low; similarly,
if R (Reset) is pulsed high while S is held low, then the Q output
is forced low, and stays low when R returns low. When both are low,
Q(t) takes the same state as Q(t-1). When they are both high, both Q
and !Q take the low values we are in an unstable state. Practically we
have to avoid this case.This block is almost used with digital
number, the input data type is int8.
The truth table of this block is
| S | R | Q(t) | !Q(t) |
| 0 | 0 | Q(t-1) | !Q(t-1) |
| 0 | 1 | 0 | 1 |
| 1 | 0 | 1 | 0 |
| 1 | 1 | 0 | 0 |
| -> This case is to avoid |
