LG 22LG300C - IR Codes; How to Connect; Remote Control IR Codes; Output Waveform

84
APPENDIX
APPENDIX
IR CODES
A
Configuration of frame
1st frame
Repeat frame
A
Lead code
A
Repeat code
A
BBiitt ddeessccrriippttiioonn
A
FFrraammee iinntteerrvvaall:: TTff
The waveform is transmitted as long as a key is depressed.
C0 C1C2C3C4C5C6C7C0C1C2C3C4C5C6C7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7
Lead code Low custom code High custom code Data code Data code
Repeat code
Tf
4.5 ms
9 ms
2.25 ms
9 ms
0.55 ms
0.56 ms
1.12 ms
0.56 ms
2.24 ms
Tf Tf
Tf=108ms @455KHz
Bit ”0” Bit ”1”
1. How to Connect
A
Connect your wired remote control to the Remote Control port on the TV.
2. Remote Control IR Codes
A
Output waveform
Single pulse, modulated with 37.917KHz signal at 455KHz
T1
Tc
Carrier frequency
FCAR = 1/TC = fOSC/12
Duty ratio = T1/TC = 1/3