APC MGETM GALAXYTM 6000 User Manual download pdf (Page 14)

Page 14 - 6739389EN/FB

CRC 16 algorithm

If the CRC 16 is calculated using

the above algorithm, the least

significant byte is transmitted first.

= exclusive or

n = number of data bits

poly = CRC 16 polynomial = 2

15

+ 2

13

+ 2

0

= $ A001

Hex FFFF --> CRC 16

CRC 16

BYTE --> CRC 16

n = 0

yes

no

yes

no

remainder

CRC 16

poly --> CRC 16

n = n+1

n > 7

END

end of message

no

yes

CRC 16 shift to the right

following byte

JBUS protocol (continued)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 37 38

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