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ST7LNB1Y0 датащи(PDF) 15 Page - STMicroelectronics

номер детали ST7LNB1Y0
подробное описание детали  DiSEqC??slave microcontroller for SaTCR based LNBs and switchers
PDF  36 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7LNB1Y0 датащи(HTML) 15 Page - STMicroelectronics

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3.3
DiSEqC 1.0 command for legacy support
The DiSEqC 1.0 commands for the control of the legacy are the following:
●
00h: this command is used to restore the backwards compatibility.
●
38h: this command is used to write to port group command.
For application supporting the legacy (except for application 1), the backwards signalling
(13/18 V, 22 kHz tone) is recognized until a valid DiSEqC 1.0 command is detected.
The following table presents the truth table for the legacy commands:
Table 12.
Legacy commands
Command
38h
Equivalent backwards
signalling
Selected feed
Band
Polarity
Satellite
E0 xx 38 F0
13v / 0 kHz
0
Low
Vertical
A
E0 xx 38 F1
13v / 22 kHz
1
High
Vertical
A
E0 xx 38 F2
18v / 0 kHz
2
Low
Horizontal
A
E0 xx 38 F3
18v / 22 kHz
3
High
Horizontal
A



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