I am a little confused about the Truth table of D-flip flop,and i want to figure it out.
According to the d-flip flop in wiki:
D-flip flop with set(S) and reset(R):
If S=R=0,Q depend on clk and D,when clk is Rising edge,and D=1,Q=1
If S=1,or R=1,Q depend on S or R,when S=1,means set Q=1; R=1,means set Q=0
If S=1,R=1,Q depend on nothing,Q=1,Q'=1
But,if d-flip flop with reset,(no set here) ,when R=0,Q is not always 0,when clk is Rising edge,and D=1,Q=1
But i see the waveform in this picture,and the waveform is not the same as the the wiki said,can anyone help me figure it out? The picture is from this website: http://macao.communications.museum/eng/exhibition/secondfloor/MoreInfo/FlipFlop.html