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STM8SPLNB1 Scheda tecnica(PDF) 40 Page - STMicroelectronics

Il numero della parte STM8SPLNB1
Spiegazioni elettronici  Internal 16MHz oscillator
PDF  44 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STM8SPLNB1 Scheda tecnica(HTML) 40 Page - STMicroelectronics

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DiSEqC™ protocol basics
STM8SPLNB1
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DocID018831 Rev 5
A.1.3
Data transfer on coaxial cable
The 22 kHz signal is also used for data communication through coaxial cable (bidirectional
transfer). In this case is used amplitude modulation of 22 kHz signal.
Bit “logical 0” coding:
1.0 ms 22 kHz signal
0.5 ms no signal
Bit “logical 0” coding:
0.5 ms 22 kHz signal
1.0 ms no signal
By this modulation is transferred full DiSEqC™ message (8 bits per byte + parity, several
bytes in message - see A.1: Physical layer).
Figure 20. DiSEqC™ bit modulation
Figure 21. Timing diagram for typical DiSEqC™ (1.0 version)



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