LG 43UT640S0UA 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