Page 337 - Engineering Digital Design

—^— Programmed Input to p-term

p-term lines
\

\
'o(H)

I 2(H)

AND
Plane
.(H)

I 7(H)

•0 0 (H)

0 3(H)

Logic 1 stored 1 Logic 0 stored
for valid p-term y permanently
i I
FIGURE 7.11
Symbolic representation of a basic unprogrammed 8 x 20 x 4 PAL with five p-term capability
(unalterable) for each of the four outputs.

308