ST7LNB0 datasheet(19/22 Pages) STMICROELECTRONICS

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ST7LNB0

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8 DEVICE CONFIGURATION

8.1 DATA EEPROM OPTION BYTES

FAM OPTION BYTE

Device Family Address.

11h: Normal LNB

15h: Normal Switcher

LOFREQ OPTION BYTE

Local Oscillator Frequency Table Entry Number

This byte indicates the value of a LNB local oscil-

lator:

Lowest Nibble = Lo Local Oscillator Frequency Ta-

ble Entry Number

Highest Nibble = Hi Local Oscillator Frequency

Table Entry Number

Note: see table 2 on page 8 of the “Eutelsat

DisEqC slave microcontroller version 1.0”.

PARAM OPTION BYTE

Output Mode and 22 kHz Tone Use (Hi/Lo or SB/

SA)

Bit 7:8 = Not used.

Bit 6 = Decoded Mode With Only Two Lines (the

lowest line of a selection group is kept low)

0: Decoded mode with only two lines not selected

1: Decoded mode with only two lines selected

Bit 5 = Complementary Mode Selection

0: Complementary Mode not selected

1: Complementary Mode selected

Bit 4:1 = Decoded Mode Number

0: Decoded Mode not selected

1 to 8 : Decoded Mode Number (refer to table 5a

on page 11 of the “Eutelsat DisEqC slave micro-

controller version 1.0”).

Bit 0 = 22 kHz Tone Use

0: 22 kHz tone use for Hi/Lo switching in back-

wards compatible mode

1: 22 kHz tone use for SB/SA switching in back-

wards compatible mode

Note: if neither a decoded mode nor a comple-

mentary output mode is selected, the output mode

is the single polarity output mode (refer to Table 3,

“Single polarity output mode,” on page 4).

Byte Name

Description

Address

FAM

Device Family Address (11h:LNB ; 15h: switcher)

1002h

LOFREQ

Local Oscillator Frequency Table Entry Numbers

1003h

PARAM

Output Mode and 22 kHz Tone Use (Hi/Lo or SB/SA)

1004h

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