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DES-3226 NWay Standalone Fast Ethernet Switch User’s Guide
E
BRIEF REVIEW OF BITWISE LOGICAL
OPERATIONS
AND
The logical AND operation compares 2 bits and if they are both “1”, then the result is “1”,
otherwise, the result is “0”.
0 1
0
0 0
1
0 1
OR
The logical OR operation compares 2 bits and if either or both bits are “1”, then the result is “1”,
otherwise, the result is “0”.
0 1
0
0 1
1
1 1
XOR
The logical XOR (exclusive OR) operation compares 2 bits and if exactly one of them is a “1”, then
the result is
“1”, otherwise the result is “0”.
0 1
0
0 1
1
1 0
NOT
The logical NOT operation simply changes the value of a single bit. If it is a “1”, the result is
“0”,
if it is a “0”, the result is “1”. This operation is carried out on a single bit.
0 1
1 0
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