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MFL35938804en-2 2/27/08 4:42 PM Page 80
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
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.
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Tc
Carrier frequency
FCAR = 1/TC = fOSC/12
T1
Duty ratio = T1/TC = 1/3
Low
High
custom code
custom code
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 code
9 ms
4.5 ms
9 ms
2.25 ms
0.56 ms
1.12 ms
Tf
Data code
Tf
0.55 ms
Bit "1"
0.56 ms
Tf
Tf=108ms @455KHz
Data code
2.24 ms
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