Hello, i need some help to solve this exercise, it is a homework problem from my university. I have to use TTL IC's.
The problem says:
A combinational circuit has as inputs two numbers (A, B) of four bits each, which must be natural BCD (from 0 to 9), two operating mode inputs (x, y) and the output is displayed on two 7-segment displays. If some of the numbers is not BCD, regardless of the inputs (x, y) a zero should be displayed. If the inputs are BCD, it must respond to the following operation table:
X Y Function
0 1 B
1 0 A
1 1 A+B
can someone give me a help to start it?
Thanks!
The problem says:
A combinational circuit has as inputs two numbers (A, B) of four bits each, which must be natural BCD (from 0 to 9), two operating mode inputs (x, y) and the output is displayed on two 7-segment displays. If some of the numbers is not BCD, regardless of the inputs (x, y) a zero should be displayed. If the inputs are BCD, it must respond to the following operation table:
X Y Function
0 1 B
1 0 A
1 1 A+B
can someone give me a help to start it?
Thanks!