APPENDIX
APPENDIX
116
IR CODES
■

Configuration of frame

1st frame
Repeat frame
■

Lead code

■

Repeat code

■BBiitt ddeessccrriippttiioonn
■FFrraammee iinntteerrvvaall:: TTff
The waveform is transmitted as long as a key is depressed.
C0 C1 C2 C3 C4 C5 C6 C7 C0 C1 C2 C3 C4 C5 C6 C7 D0 D1 D2 D3D4 D5 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
■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
T1
Tc
Carrier frequency
FCAR = 1/TC = fOSC/12
Duty ratio = T1/TC = 1/3