D flip-flop with SET and CLR inputs

This D flip-flop is an edge-triggered D flip-flop with two additional inputs CLR (clear) and SET (set). With the input CLR, the internal state can be set directly to 0. The input CLR is inverted, i.e. CLR=0 sets the internal state directly to 0. With the input SET, the internal state can be set directly to 1.

Truth table

CLR	SET	C	D	Q1	Q2
1	1	x	x	1	0
0	0	x	x	0	1
0	1	x	x	1	1
1	0	↑	0	0	1
1	0	↑	1	1	0
1	0	x	x	q1	q2

Comments:

x = any (0 or 1) ↑ = positive edge from 0 to 1 q = state of output Q remains unchanged