2

FUNCTION TABLE

H = high level, L = low level

Note:

Input conditions at A1, A2, B1, B2, and C0 are used to determine outputs

Σ1 and Σ2 and the value of the internal carry C2. The values at C2, A3, B3, A4, and B4

are then used to determine outputs

Σ3, Σ4, and C4.

INPUT

OUTPUT

When C0 = L

When C2 = L

When C0 = H

When C2 = H

A1

A3

B1

B3

A2

A4

B2

B4

Σ1

Σ3

Σ2

Σ4

C2

C4

Σ1

Σ3

Σ2

Σ4

C2

C4

L

L

L

L

L

L

L

H

L

L

H

L

L

L

H

L

L

L

H

L

L

H

L

L

H

L

L

L

H

L

H

H

L

L

L

H

L

H

H

L

L

L

H

L

L

H

L

H

H

L

H

L

H

L

H

H

L

L

L

H

L

H

H

L

H

H

L

L

L

H

H

H

H

L

L

L

H

H

L

H

L

L

L

H

L

H

L

H

H

L

H

L

L

H

H

H

L

L

L

H

L

H

L

H

H

H

L

L

L

H

H

H

L

H

L

L

H

H

L

H

L

L

H

H

L

L

H

H

L

H

H

L

H

H

H

L

H

L

H

H

L

H

H

H

H

L

H

L

H

H

H

H

H

H

L

H

H

H

H

H