Excitation tables: D flip-flop
	Characteristic tables define the behavior of flip-flops:
		D flip-flop						T flip-flop
		D	Q	Q+	Operation			T	Q	Q+	Operation
		0	0	0	reset			0	0	0	hold
		0	1	0	reset			0	1	1	hold
		1	0	1	set			1	0	1	toggle
		1	1	1	set			1	1	0	toggle
	Excitation table: Shows what input is necessary to generate a given output
		Different view of flip-flop operation
		Inputs: Q, Q+
		Output: control (D or T)
		Q	Q+	D
		0	0	0		How do we get a new state of 0 with a D flip-flop?
		0	1	1			Input 0
		1	0	0		How do we get a new state of 1 with a D flip-flop?
		1	1	1			Input 1
		Notice that column D is a copy of column Q+,
			because the new state is the same as the control input D