+---+---+---+----+
| | R | Q | Q′ |
+---+---+---+----+
| 0 | 0 | 0 | 1 |
+---+---+---+----+
| 0 | 1 | 0 | 1 |
+---+---+---+----+
| 1 | 0 | 1 | 0 |
+---+---+---+----+
| 1 | 1 | ∞ | ∞ |
+---+---+---+----+SR Flip Flop
S R Q Q′
0 0 0 1
0 1 0 1
1 0 1 0
1 1∞∞
D Flip-Flop
Clock D Q Q’
↓ » 0 0 0 1
↑ » 1 0 0 1
↓ » 0 1 0 1
↑ » 1 1 1 0
S
R
Q
Q'
S
R
Q
Q'
Q
Q'
D
Q
Q'
S
R
Q0
SH/LD
SER
Q0
ERC Warnings
flop1:D: Input pin not driven
flop2:S: Input pin not driven
flop2:R: Input pin not driven
flop3:S: Input pin not driven
flop3:R: Input pin not driven
nand13:B: Input pin not driven
flop1:CLK: Clock driven by combinatorial logic
flop2:CLK: Clock driven by combinatorial logic
flop3:CLK: Clock driven by combinatorial logic
flop5:CLK: Clock driven by combinatorial logic