LG 43US340C0UD INSTALLATION - Page 60

RS-232C Configurations, Communication Parameters, IR OUT Using Guide

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ENGLISH RS-232C Configurations IR OUT Using Guide 7-Wire Configurations (Standard RS-232C cable) PC RXD 2 TXD 3 GND 5 DTR 4 DSR 6 RTS 7 CTS 8 D-Sub 9 TV 3 TXD 2 RXD 5 GND 6 DSR 4 DTR 8 CTS 7 RTS D-Sub 9 3-Wire Configurations (Not standard) PC RXD 2 TXD 3 GND 5 DTR 4 DSR 6 RTS 7 CTS 8 D-Sub 9 TV 3 TXD 2 RXD 5 GND 6 DSR 4 DTR 8 RTS 7 CTS D-Sub 9 Communication Parameters •• Baud rate: 9,600 bps (UART) •• Data length: 8 bits •• Parity : None •• Stop bit: 1 bit •• Communication code: ASCII code •• Use a crossed (reverse) cable. Suitable / Not Recommend remotecontroller data format Item Suitable data format Not recommend data format Formats NEC, RC5, Toshiba Continuous data format (short burst/gap signal) IR Receiver specifications Carrier frequency 37.9 KHz Peak Wavelength 940 nm Minimum burst length Min. 300 us Minimum gap time is required of Min. 350 us Data word length Max. 100 ms Minimum gap time in the data stream Min. 50 ms is needed of Parameter Symbol Conditions Min Typ Max Unit High Level Out Pulse Width Twh Burst Wave 400 - 800 µs = 600 µs Low Level Period = Out Pulse Twl 1.2 ms 400 - 800 µs Width •• If not use the remote-controller with data formats recommended, IR output signals will be suppressed automatically by IR receiver. •• In this case, LG does not guarantee IR working function. •• To make sure of this matter, here are two methods as below. -- Use the remote-controller with suitable data formats. -- Use the IR dongle receiver of the set-top box. 60

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ENGLISH
60
RS-232C Configurations
7-Wire Configurations
(Standard RS-232C cable)
PC
TV
RXD
2
3
TXD
TXD
3
2
RXD
GND
5
5
GND
DTR
4
6
DSR
DSR
6
4
DTR
RTS
7
8
CTS
CTS
8
7
RTS
D-Sub 9
D-Sub 9
3-Wire Configurations
(Not standard)
PC
TV
RXD
2
3
TXD
TXD
3
2
RXD
GND
5
5
GND
DTR
4
6
DSR
DSR
6
4
DTR
RTS
7
8
RTS
CTS
8
7
CTS
D-Sub 9
D-Sub 9
Communication Parameters
•
Baud rate: 9,600 bps (UART)
•
Data length: 8 bits
•
Parity : None
•
Stop bit: 1 bit
•
Communication code: ASCII code
•
Use a crossed (reverse) cable.
IR OUT Using Guide
Suitable / Not Recommend remote-
controller data format
Item
Formats
Suitable data
format
NEC, RC5, Toshiba
Not recommend
data format
Continuous data format (short burst/gap
signal)
IR Receiver specifications
Carrier frequency
37.9 KHz
Peak Wavelength
940 nm
Minimum burst
length
Min. 300 us
Minimum gap time
is required of
Min. 350 us
Data word length
Max. 100 ms
Minimum gap time
in the data stream
is needed of
Min. 50 ms
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
High Level
Out Pulse
Width
Twh
Burst Wave
= 600
µs
Period =
1.2 ms
400
-
800
µs
Low Level
Out Pulse
Width
Twl
400
-
800
µs
•
If not use the remote-controller with data formats
recommended, IR output signals will be suppressed
automatically by IR receiver.
•
In this case, LG does not guarantee IR working function.
•
To make sure of this matter, here are two methods as
below.
-
Use the remote-controller with suitable data formats.
-
Use the IR dongle receiver of the set-top box.