IR CODES

1.How to Connect

Connect your wired remote control to the Remote Control port on the TV.

2.Remote Control IR Codes

Output waveform

Single pulse, modulated with 37.917KHz signal at 455KHz

 

Tc

 

 

 

Carrier frequency

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FCAR = 1/TC = fOSC/12

 

 

 

 

 

 

T1

Duty ratio = T1/TC = 1/3

 

Configuration of frame

1st frame

Lead code

Low custom code

High custom code

Data code

Data 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

Repeat code

Tf

Lead code

9 ms

4.5 ms

Repeat code

9 ms

0.55 ms

2.25 ms

APPENDIX

Bit description

Bit ”0”

 

 

Bit ”1”

 

 

 

 

 

0.56ms

1.12ms

Frame interval: Tf

The waveform is transmitted as long as a key is depressed.

0.56 ms

2.24 ms

 

Tf

 

 

 

Tf

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tf=108ms @455KHz

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LG Electronics 4750DC, 5250DC owner manual Remote Control IR Codes