PPT Slide

1 � Introduction

� 1996 Gaetano Borriello

31

Combinational example (continued)

• Truth-table to logic to switches to gates

  • 28 = 1 when month=0010 and leap=0
  • 28 = m1'�m2'�m3�m4'�leap'
  • 31 = 1 when month=0001 or month=0011 or ... month=1100
  • 31 = (m1'�m2'�m3'�m4) + (m1'�m2'�m3�m4) + ... (m1�m2�m3'�m4')
  • 31 = can we simplify more?

symbol for and

symbol for or

symbol for not

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