
Visual Systems Division
Technical Bulletin
MultiSync
VT440/540 Installation Data
Desktop and Ceiling Mount
Rev. 1.5
Page 8
PC Control Codes
Function
Code Data
POWER ON
02H
00H
00H
00H
00H
02H
POWER OFF
02H
01H
00H
00H
00H
03H
INPUT SELECT RGB
02H
03H
00H
00H
02H
01H
01H
09H
INPUT SELECT VIDEO
02H
03H
00H
00H
02H
01H
06H
0EH
INPUT SELECT S-VIDEO
02H
03H
00H
00H
02H
01H
0BH
13H
PICTURE MUTE ON
02H
10H
00H
00H
00H
12H
PICTURE MUTE OFF
02H
11H
00H
00H
00H
13H
SOUND MUTE ON
02H
12H
00H
00H
00H
14H
SOUND MUTE OFF
02H
13H
00H
00H
00H
15H
ON SCREEN MUTE ON
02H
14H
00H
00H
00H
16H
ON SCREEN MUTE OFF
02H
15H
00H
00H
00H
17H
Cable Connection
Communication Protocol:
Baud Rate:
38400 bps
Data Length:
8 bits
Parity:
No Parity
Stop Bit:
One bit
X on/off:
None
Communications: Full duplex
PC Control Connector (DIN-8P)
8
7
6
5
4
3
2
1
To GND of PC
To TxD of PC
To RxD of PC
NOTE:
Pins 2, 3, 5, 6 and 8 are used inside the projector.