Design an octal-to-binary priority encoder, and specify its truth table. Provide

ID: 3861833 • Letter: D

Question

Design an octal-to-binary priority encoder, and specify its truth table. Provide an output, V, which indicates validity (that is, at least one of the inputs is present.) V is 1 when at least 1 input is present; otherwise, V is 0. The input with the highest subscript number (listed from L to R as D0 to D7) has the highest priority. The binary numeric outputs are x, y and z. Indicate what the value of the four outputs are if D2 and D6 are 1 at the same time.

https://gyazo.com/3883ca38070815d0f25e745d9052110e

Explanation / Answer

The truth table of an octal to binary priority encoder which provide an output v which indicates validity to show that atleast one of the inputs is pressent is given below

0 0 0 0 0 0 0 0

1 0 0 0 0 0 0 0

X 1 0 0 0 0 0 0

X X 1 0 0 0 0 0

X X X 1 0 0 0 0

X X X X 1 0 0 0

X X X X X 1 0 0

X X X X X X 1 0

X X X X X X X 1

D0 D1 D2 D3 D4 D5 D6 D7 X Y Z V