ST7LNB1Y0 datasheet(15/36 Pages) STMICROELECTRONICS

Part #	ST7LNB1Y0

Description	DiSEqC??slave microcontroller for SaTCR based LNBs and switchers

PDF	36 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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15 / 36 page

ST7LNB1Y0

Functional description

15/36

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

Low

Vertical

E0 xx 38 F1

13v / 22 kHz

High

Vertical

E0 xx 38 F2

18v / 0 kHz

Low

Horizontal

E0 xx 38 F3

18v / 22 kHz

High

Horizontal

ST7LNB1Y0 Datasheet(PDF) 15 Page - STMicroelectronics