STM8SPLNB1 STMicroelectronics, STM8SPLNB1 Datasheet - Page 39

• Manufacturer Part Number: STM8SPLNB1
• Description: DiSEqC slave microcontroller for SaTCR based LNBs and switchers
• Manufacturer: STMicroelectronics

STM8SPLNB1
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:
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Bit “logical 0” coding:
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●
By this modulation is transferred full DiSEqC™ message (8 bits per byte + parity, several
bytes in message - see
Figure 19. DiSEqC™ bit modulation
Figure 20. Timing diagram for typical DiSEqC™ (1.0 version)
1.0 ms 22 kHz signal
0.5 ms no signal
0.5 ms 22 kHz signal
1.0 ms no signal
A.1: Physical
Doc ID 018831 Rev 3
layer).
DiSEqC™ protocol basics
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