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Hydran* 201i Instruction Manual
3.
4.
5.
6.
7.
8.
9.
10.
11.
Symbol
-->
A
Alow
Ahigh
CRC
i,j
(+)
N
Di
G
shr (x)
MA-033
Rev. 14.0, 12-Nov-18
0 --> j
Di (+) Alow --> Alow
j + 1 --> j
shr (A)
Is there a
No: go to 8; Yes: G (+) A --> A and
carry?
continue
Is j = 8?
No: go to 5; Yes: continue
i + 1 --> i
Is i = N?
No: go to 3; Yes: continue
A --> CRC
Table J - 2 CRC-16 Algorithm
Data transfer
16-bit working register
Low-order byte of A
High-order byte of A
16-bit CRC-16 result
Loop counters
(+) logical Exclusive Or operator
Total number of data bytes
i-th data byte (i = 0 to N-1)
16-bit characteristic polynomial = 1010000000000001 (binary)
with MSbit dropped and bit order reversed
Right shift operator (the LSbit of x is shifted into a carry flag, a "0"
Description
Page 245
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