There are many circuits that have the same truth table as a half adder.
|
A |
B |
Carry |
Sum |
|
0 |
0 |
0 |
0 |
|
0 |
1 |
0 |
1 |
|
1 |
0 |
0 |
1 |
|
1 |
1 |
1 |
0 |
The purpose of a half adder is to do the following additions
|
00 |
+ |
00 |
+ |
01 |
+ |
01 |
+ |
A |
+ |
|
00 |
|
01 |
|
00 |
|
01 |
|
B |
|
|
00 |
|
01 |
|
01 |
|
10 |
|
CS |
|
