Remote Control Pass-Through Mode; Cd4233 - ViewSonic CD4233 Hardware Interface Spec And Software Protocols

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
Byte Count 3
Bytes order 1
Example: Remote Control pass-through when "Menu" key is pressed (1A)
Name Length
Byte Count 3
Bytes order 1
Example: Remote Control pass-through when key "1" is pressed (01)
Name Length
Byte Count 3
Bytes order 1
Example: Remote Control pass-through when "OK" key is pressed (1F)
Name Length
Byte Count 3
Bytes order 1
Key
Size
Volume Up (+)
Volume Down (-)
Mute
POWER
INPUT
PIP ON/OFF
MENU
Up
Down
Left(-)
Right(+)
SET
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May 28, 2007
Commercial Display RS-232 Protocol
RCU-Code1 RCU-Code2
MSB LSB
2 3
RCU-Code1 RCU-Code2
1 A
2 3
RCU-Code1 RCU-Code2
0 1
2 3
RCU-Code1 RCU-Code2
1 F
2 3
Code (HEX)
15 / 16
CR
00D
4
CR
00D
4
CR
00D
4
CR
00D
4
0F
10
11
12
15
16
17
1A
1B
1C
1D
1E
1F
Commercial Display RS-232 Protocol
Revision 1.x