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Fr33t

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## Homework Statement

Here's the problem:

Design a logic network that can display the characters in “APPLE” on a sevensegment

display unit. Write the truth table for the output functions C0-C6, minimize them

by using Karnaugh Map, and implement using discrete logic gates.

(Hints: Character “A” will be displayed if segments (C0, C1, C2, C4, C5, C6) of a 7-

segment display are turned on and segment (C3) is turned off. Since only 4 characters

will be displayed, input of 2 bits to encode them will be needed for the given design.)

Now, where I get confused is when it says an input of 2 bits to encode them will be needed. I understand that technically only 2 bits are needed, but I do not understand how to implement it using only 2 instead of 4. I've been searching and thinking of different ways to do it but I am stumped.

## Homework Equations

Not quite applicable

## The Attempt at a Solution

With 2 bits to work with:

00 = A

01 = P

10 = L

11 = E

Code:

```
A B C0 C1 C2 C3 C4 C5 C6
0 0 1 1 1 0 1 1 1
0 1 1 1 0 0 1 1 1
1 0 0 0 0 1 1 1 0
1 1 1 0 0 1 1 1 1
```

Any help will be greatly appreciated! Thanks

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