+---+---+---+----+
| | R | Q | Q′ |
+---+---+---+----+
| 0 | 0 | 0 | 1 |
+---+---+---+----+
| 0 | 1 | 0 | 1 |
+---+---+---+----+
| 1 | 0 | 1 | 0 |
+---+---+---+----+
| 1 | 1 | ∞ | ∞ |
+---+---+---+----+Q0
Q1
Q2
Q3
SH/LD
CLK
ERC Warnings
nand2:A: Input pin not driven
nand5:A: Input pin not driven
nand8:A: Input pin not driven
nand11:A: 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
flop4:CLK: Clock driven by combinatorial logic