4:2 Encoder
Interrupt controllers and bus arbiters rely on translating individual active request lines into a compact binary representation. The standard 4:2 encoder performs this compression when only one input line is active at a time.
The circuit takes four mutually exclusive input lines and produces a 2-bit binary output corresponding to the index of the active input.
| I3 | I2 | I1 | I0 | A1 | A0 | |------|------|------|------|------|------| | 0 | 0 | 0 | 1 | 0 | 0 | | 0 | 0 | 1 | 0 | 0 | 1 | | 0 | 1 | 0 | 0 | 1 | 0 | | 1 | 0 | 0 | 0 | 1 | 1 |
Constraints
- Use combinational logic only.
- Assume inputs are strictly one-hot.
Topics
Solve this problem
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