Research Article
First Steps in Creating Online Testable Reversible Sequential Circuits
Table 5
Truth table representing the next states and the modified next states of a four-bit serial-in serial-out right-shift register [
43].
| Present state | Next state | Modified next state | | | |
| 00000 | 0000 | 0000 | 00001 | 0000 | 0001 | 00010 | 0001 | 0011 | 00011 | 0001 | 0010 | 00100 | 0010 | 0110 | 00101 | 0010 | 0111 | 00110 | 0011 | 0101 | 00111 | 0011 | 0100 | 01000 | 0100 | 1100 | 01001 | 0100 | 1101 | 01010 | 0101 | 1111 | 01011 | 0101 | 1110 | 01100 | 0110 | 1010 | 01101 | 0110 | 1011 | 01110 | 0111 | 1001 | 01111 | 0111 | 1000 | 10000 | 1000 | 1000 | 10001 | 1000 | 1001 | 10010 | 1001 | 1011 | 10011 | 1001 | 1010 | 10100 | 1010 | 1110 | 10101 | 1010 | 1111 | 10110 | 1011 | 1101 | 10111 | 1011 | 1100 | 11000 | 1100 | 0100 | 11001 | 1100 | 0101 | 11010 | 1101 | 0111 | 11011 | 1101 | 0110 | 11100 | 1110 | 0010 | 11101 | 1110 | 0011 | 11110 | 1111 | 0001 | 11111 | 1111 | 0000 |
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