ViewSonic CD4233 - Remote Control Pass-Through Mode; Cd4233

Commercial Display RS-232 Protocol
Revision 1.x
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May 28, 2007 15 / 16 Commercial Display RS-232 Protocol
4.3 Remote Control Pass-through mode
When PC sets the LCD monitor to Remote Control Pass through mode, the LCD shall send a three
bytes packet (followed by “CR”) in response to RCU button activation. Note, that in this mode the
RCU shall have no effect on the monitor function. For example: “+Volume” will not change the
volume in the LCD but only sends “+Volume” code to PC over the RS232 port.
Remote Control pass-through packet format from LCD monitor to PC(ASCII)
Name
Length
RCU-Code1
RCU-Code2
CR
Byte Count
3
MSB
LSB
00D
Bytes order
1
2
3
4
Example: Remote Control pass-through when “Menu” key is pressed (1A)
Name
Length
RCU-Code1
RCU-Code2
CR
Byte Count
3
1
A
00D
Bytes order
1
2
3
4
Example: Remote Control pass-through when key “1” is pressed (01)
Name
Length
RCU-Code1
RCU-Code2
CR
Byte Count
3
0
1
00D
Bytes order
1
2
3
4
Example: Remote Control pass-through when “OK” key is pressed (1F)
Name
Length
RCU-Code1
RCU-Code2
CR
Byte Count
3
1
F
00D
Bytes order
1
2
3
4
Key
Code (HEX)
Size
0F
Volume Up (+)
10
Volume Down (-)
11
Mute
12
POWER
15
INPUT
16
PIP ON/OFF
17
MENU
1A
Up
1B
Down
1C
Left(-)
1D
Right(+)
1E
SET
1F