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APPENDIX
115
IR
CODES
Configuration
of
frame
1st frame
Repeat
frame
Lead
code
Repeat
code
Bit
description
Frame
interval:
Tf
The
waveform
is
transmitted
as
long
as
a
key
is
depressed.
C0C1C2C3C4C5C6C7C0C1C2C3C4C5C6C7D0D1D2D3D4D5D6D7D0D1D2D3D4D5D6D7
Lead
code
Low
custom
code
High
custom
code
Data
code
Data
code
Repeat
code
Tf
4.5
ms
9ms
2.25
ms
9ms
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
512F-2
06/6/29
8:30
AM
Page
115
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