Ir Codes - LG 42PJ250R Manual De Usuario

MFL62883001-Edit3-en 3/17/10 3:47 PM Page 108
APPENDIX

IR CODES

1. How to Connect
Connect your wired remote control to the Remote Control port on the TV.
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2. Remote Control IR Codes
Output waveform
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Single pulse, modulated with 37 .917KHz signal at 455KHz
Configuration of frame
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1st frame
Lead code
C0 C1 C2 C3 C4 C5 C6 C7 C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3 D4 D5 D6 D7 D0 D1 D2 D3 D4 D5 D6 D7
Repeat frame
Lead code
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Repeat code
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B B i i t t d d e e s s c c r r i i p p t t i i o o n n
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Bit "0"
F F r r a a m m e e i i n n t t e e r r v v a a l l : : T T f f
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The waveform is transmitted as long as a key is depressed.
108
Tc
T1
Low custom code High custom code
Repeat code
9 ms
9 ms
2.25 ms
0.56 ms
1.12 ms
Tf
Carrier frequency
FCAR = 1/TC = fOSC/12
Duty ratio = T1/TC = 1/3
Data code
Tf
4.5 ms
0.55 ms
Bit "1"
0.56 ms
Tf
Tf=108ms @455KHz
Data code
2.24 ms