Page 107 - Understanding Automotive Electronics

2735 | CH 3 Page 94 Tuesday, March 10, 1998 11:03 AM

3 ELECTRONICS FUNDAMENTALS

Table 3.4
Arithmetic Function, M = 0
Arithmetic Logic
Functions Select S Logic Function, C = 1 C = 0
Input M = 1 n n
0000 F = A (NOT) F = A F = A Plus 1

0001 F = A + B (NOR) F = A + B F = (A + B) Plus 1
0010 F = A B F = A + B F = (A + B ) Plus 1

0011 F = 0 F = Minus 1 F = 0
(2’s Complement)

0100 F = AB (NAND) F = A + AB F = (A + AB ) Plus 1
F = (A + B) Plus F = ( A + B) Plus
0101
F = B (NOT)
AB AB + 1
0110 F = AB + BA F = (A – B) Minus 1 F = A Minus B
(Exclusive OR)
0111 F = AB F = AB Minus 1 F = AB

1000 F = A + B (Implica- F = A + AB F = (A + B) Plus 1
tion)

1001 F = AB + AB (NOT F = A + B F = (A + B) Plus 1
exclusive OR)
1010 F = B F = (A + B ) Plus F = (A + B )
AB Plus A + 1
1011 F = AB (AND) F = AB Minus 1 F = AB

1100 F = 1 F = A Plus A* F = (A + A) Plus 1
1101 F = A + B F = (A + B) Plus A F = (A + B)
Plus A + 1
1110 F = A + B (OR) F = (A + B ) Plus A F = (A + B )
Plus A + 1

1111 F = A F = A Minus 1 F = A
*Each bit is shifted to the next more significant position.

94 UNDERSTANDING AUTOMOTIVE ELECTRONICS