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STM8SPLNB1 数据表(PDF) 40 Page - STMicroelectronics

部件名 STM8SPLNB1
功能描述  Internal 16MHz oscillator
PDF  44 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STM8SPLNB1 数据表(HTML) 40 Page - STMicroelectronics

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DiSEqC™ protocol basics
STM8SPLNB1
40/44
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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