Check Code - NEC X461UN - MultiSync - 46" LCD Flat Panel Display Control Manual

Message format of the "Set parameter" is as follows,
OP code
STX page
Hi Lo

Refer to section 5.3 "Set parameter" for more details.
4 ÿ Set Parameter reply
The monitor replies with this message for a confirmation of the "Set parameter message".
Message format of the "Set parameter reply" is as follows,
OP code
Result
STX page
Hi Lo Hi

Refer to section 5.4 "Set parameter reply" for more details.
5 ÿ Command
"Command message" format depends on each command.
Usually, this "command message" is used for some non-slider controls and some special operations,
such as "Save current settings", "Get timing report", "power control", "Schedule", etc. Refer to
section 5.5 "Commands message" for more details.
6 ÿ Command reply
The monitor replies to a query from the controller.
"Command reply message" format depends on each command.
Refer to section 5.5 "Commands message" for more details.

4.5 Check code

Check code is the Block Check Code (BCC) between the Header and the End of Message except SOH.
SOH
Reserved
Destination
Source
Type
Length(H)
Length(L)
STX
Data
|
|
ETX
Check code
D = D XOR D XOR D
n+1 1 2
XOR: Exclusive OR
OP code Set Value
Hi Lo MSB
OP code Type
Lo Hi Lo Hi
Header Message
7
2
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
8
|
|
D
n
D P
n+1
XOR ,,, D
3 n
ETX
LSB
Max value
Lo MSB LSB
Check code
Delimiter
6 5 4 3
2 2 2 2
P P P P
(5/43)
Requested setting
Value
MSB LSB
2 1 0
2 2 2
P P P
ETX