LRI512 데이터 시트보기 (PDF) - STMicroelectronics
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LRI512
STMicroelectronics
LRI512 Datasheet PDF : 54 Pages
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LRI512
Data Coding Mode: 1 Out of 4
The value of 2 bits is represented by the position
of one pause. The position of the pause on 1 of 4
successive time periods of 18.88 µs (256/fC), de-
termines the value of the 2 bits. Four successive
pairs of bits form a byte, where the least significant
pair of bits is transmitted first.
In this case the transmission of one byte takes
302.08 µs and the resulting data rate is 26.48 kbit/
s (fC/512). Figure 7 illustrates the 1 out of 4 pulse
position technique and coding.
Figure 7. 1 Out of 4 Coding Mode
Pulse position for "00"
9.44 µs
9.44 µs
Pulse position for "01" (1=LSB)
75.52 µs
28.32 µs
Pulse position for "10" (0=LSB)
9.44 µs
75.52 µs
Pulse position for "11"
47.20µs
9.44 µs
75.52 µs
75.52 µs
For example Figure 8 shows the transmission of
E1h (225d, 1110 0001b) by the VCD.
Figure 8. 1 Out of 4 Coding Example
10
00
01
66.08 µs
9.44 µs
AI06658
11
75.52 µs
6/54
75.52 µs
75.52 µs
75.52 µs
AI06659
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