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RS-232C Configurations
7-Wire Configurations
(Standard RS-232C cable)
PC
RXD
2
3
TXD
GND
5
4
DTR
DSR
6
RTS
7
8
CTS
D-Sub 9
3-Wire Configurations
PC
2
RXD
TXD
3
GND
5
4
DTR
DSR
6
7
RTS
CTS
8
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.
56
TV
3
2
5
6
4
8
7
D-Sub 9
(Not standard)
TV
3
2
5
6
4
8
7
D-Sub 9
IR OUT Using Guide
Suitable / Not Recommend remote-
controller data format
Item
Suitable data format
TXD
Not recommend data format
RXD
GND
IR Receiver specifications
DSR
(Except for WU96*)
DTR
CTS
Carrier frequency
RTS
Peak Wavelength
Minimum burst length
Minimum gap time is required of
Data word length
Minimum gap time in the data stream
is needed of
(Only WU96*)
TXD
RXD
Carrier frequency
GND
Peak Wavelength
DSR
Minimum burst length
DTR
Minimum gap time is required of
RTS
CTS
Data word length
Minimum gap time in the data stream
is needed of
Parameter Symbol
High Level
Out Pulse
Twh
Width
Low Level
Out Pulse
Twl
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.
Formats
NEC, RC5, Toshiba
Continuous data format
(short burst/gap signal)
37.9 KHz
940 nm
Min. 300 us
Min. 350 us
Max. 100 ms
Min. 50 ms
38 KHz
940 nm
16 cycles (420 µs)
21 cycles (550 µs)
Max. 100 ms
30 ms
Conditions Min Typ Max Unit
Burst Wave
400
-
800
= 600 µs
Period =
400
-
800
1.2 ms
µs
µs
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