LG 22LH20R User Manual
115
APPENDIX
IR CODES
A
Configuration of frame
1st frame
Repeat frame
A
Lead code
A
Repeat code
A
B
Biitt d
deessccrriip
pttiio
on
n
A
FFrraam
mee iin
ntteerrvvaall:: T
Tff
The waveform is transmitted as long as a key is depressed.
C0 C1 C2 C3 C4C5 C6 C7 C0 C1 C2 C3 C4C5 C6 C7 D0 D1 D2 D3 D4D5 D6 D7 D0 D1 D2 D3 D4D5 D6 D7
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