Intel 9150N NE80567KE025015 User Manual
Product codes
NE80567KE025015
Intel
®
Itanium
®
Processor 9300 Series Datasheet
111
System Management Bus Interface
Checksums are automatically calculated and programmed. The first step in calculating
the checksum is to add each byte from the field to the next subsequent byte. The
second step is to take the 2’s complement of the first step. This value is the checksum.
the checksum is to add each byte from the field to the next subsequent byte. The
second step is to take the 2’s complement of the first step. This value is the checksum.
Example: For a byte string of AA445Ch, the resulting checksum will be B6h.
AA = 10101010
44 = 01000100
5C = 0101100
First step: add the bytes.
AA + 44 + 5C = 01001010
AA + 44 + 5C = 01001010
Second step: take 2’s complement.
10110101 +1 = 10110110
10110101 +1 = 10110110
Checksum is 0xB6
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