Question: Construct a 3-to-8 line decoder by using two 2-to-4 line decoders with active LOW enagle. (Use block diagrams to represent the 2-to-4 line decoders, and
Construct a 3-to-8 line decoder by using two 2-to-4 line decoders with active LOW enagle. (Use block diagrams to represent the 2-to-4 line decoders, and show the truth table for your design.)
I am guessing the table would look something like this.
| En | h | j | k | D0 | D1 | D2 | D3 | D4 | D5 | D6 | D7 |
| 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 |
| 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 |
| 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 |
| 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 |
| 0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 |
| 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 |
| 1 | X | X | X | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
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