Grass Valley XSwitch Feb 08 2006 - Manual (Page 35)

XSWITCH Installation and Operation Manual 35
Communication Flow Charts
Figure 21. Update CRC
Update CRC
Count <-- 8
B <-- CRC.0 XOR Byte.0
CRC <-- CRC Shifted
Right 1
B = 1?
CRC <-- CRC XOR 8408H
Byte <-- Byte Shifted Right 1
Count <-- Count - 1
Count = 0?
Done
No
No
Yes
Yes