Set dominant (FFS)

RS flip-flop function block with dominant Set input.

Truth table

R S Q (t)
0 0 Q (t-1)
0 1 1
1 0 0
1 1 1


Name I/O Type(s) Function
S I BIT Set input
R I BIT Reset input
Q O BIT Result


If output Q is a logical 1, the function block will be highlighted.


Typically used to store binary state information – transforms binary impulse signals into static signals.