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13.2.25
Letterbox Button
Direct access to select the picture in letterbox aspect ratio
13.3
Remote Control Timing Definitions:
13.3.1
The modulated carrier is derived from a 432KHx clock and is 1/12 of the
frequency with a 1/3 duty cycle.
13.3.2
When data is transmitted repeatedly, the frame cycle is 113.7mS or 256T
periods.
13.3.3
A frame consists of a two-bit sync code, a one-bit toggling control code, a
five-bit system code (address) and a six-bit data code.
1 Frame
256T
1 Frame:
S0
S1
TG
S0, S1 = Sync (2 bit)
TG = Toggle (1 bit)
C0-C4 = Custom address code (1 bit, see below)
D0-D4 = Data code (5 bit, see table below)
Data item
Data off time
Data on time
Data period (0)
Data period (1)
Frame output cycle
256T
C0
C1
C2
Time (sec.)
0.888mS
0.888mS
3.552mS
3.552mS
113.7mS
256T
256T
C3
C4
D0
Time (no. of period)
2T
2T
4T
4T
256T
17
D1
D2
D3
D4
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