PPT Slide

3 – Combinational Logic Implementation

© 1996 Gaetano Borriello

Example of programmable logic array

• Multiple functions of A, B, C

  • F1 = A B C
  • F2 = A + B + C
  • F3 = A' B' C'
  • F4 = A' + B' + C'
  • F5 = A xor B xor C
  • F6 = A xnor B xnor C

47

A B C F1 F2 F3 F4 F5 F6

0 0 0 0 0 1 1 0 0

0 0 1 0 1 0 1 1 1

0 1 0 0 1 0 1 1 1

0 1 1 0 1 0 1 0 0

1 0 0 0 1 0 1 1 1

1 0 1 0 1 0 1 0 0

1 1 0 0 1 0 1 0 0

1 1 1 1 1 0 0 1 1

full decoder as for memory address

bits stored in memory

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