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RS-232C Configurations
7-Wire Configurations
(Standard RS-232C cable)
PC
RXD
2
TXD
3
GND
5
4
DTR
DSR
6
7
RTS
CTS
8
D-Sub 9
3-Wire Configurations
PC
2
RXD
TXD
3
5
GND
DTR
4
DSR
6
RTS
7
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.
60
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
TXD
format
RXD
Not recommend
GND
data format
DSR
IR Receiver specifications
DTR
CTS
Carrier frequency
RTS
Peak Wavelength
Minimum burst
length
Minimum gap time
is required of
Data word length
Minimum gap time
TXD
in the data stream
is needed of
RXD
GND
Parameter Symbol
DSR
DTR
High Level
Out Pulse
Twh
RTS
Width
CTS
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
Conditions Min Typ Max Unit
Burst Wave
400
-
800
= 600 µs
Period =
400
-
800
1.2 ms
µs
µs
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