Multi-Level Logic: CAD Tools for Simplification

More Examples

mis with standard simplification script:

misII -f script -t pla <espresso truth table file>

Full Adder:

.model full.adder

.inputs a b ci

.outputs sum co

.names a b ci co sum

1--0 1

-1-0 1

--10 1

111- 1

.names a b ci co

11- 1

1-1 1

-11 1

.end

mis pla style outputs

input variables

output variable

SUM = A CO' + B CO' + CI CO' + A B CI (9 literals)

CO = A B + A CI + B CI (6 literals)

Note that A xor B xor CI = A' B' CI + A B' CI' + A' B CI' + A B CI (12 literals!)

Previous slide

Next slide

Back to first slide

View graphic version