STM8SPLNB1 datasheet(12/44 Pages) STMICROELECTRONICS

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STM8SPLNB1 operation

STM8SPLNB1

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DocID018831 Rev 5

2.2.4

Command 0x38

This command is used to write to port group command - legacy support.

For application supporting the legacy (except for application number 1), the backwards

signaling (13/18 V, 22 kHz tone) is recognized until a valid DiSEqC 1.0 command is

detected.

The following Table 8: Command 0x38 format presents the truth table for the legacy

commands.

2.2.5

Command 0x5A

This command is used during LNB (or switched) normal operation (default operation after

configuration). Command 0x5A is DiSEqC command (see Table 9: Command 0x5A format)

with two data bytes. In dependence from those data bytes are performed two subcommands

which descriptions are in Table 10: Subcommands 0x5A format - ODU_SaTCR_Op.

Table 8. Command 0x38 format

command

equivalent

backward signalling

selected

feed

band

polarity

satellite

E0 xx 38 F0

13V / 0kHz

Low

Vertical

E0 xx 38 F1

13V / 22kHz

High

Vertical

E0 xx 38 F2

18V / 0kHz

Low

Horizontal

E0 xx 38 F3

18V / 22kHz

High

Horizontal

Table 9. Command 0x5A format

frame

DiSEqC™

address

command

data1

data2

0xE0/0xE2

[device address]

0x5A

[data1](1)

1. See

Table 10: Subcommands 0x5A format - ODU_SaTCR_Op for details.

[data2](1)

Table 10. Subcommands 0x5A format - ODU_SaTCR_Op

subcommand

data1

data2

description

[7:5]

[4:2]

[1:0]

[7:0]

ODU_ChangeChannel SaTCR(1)

1. SaTCR number - see Table 2: SaTCRs implementation - ST7LNB1 compatible mode.

Feed(2)

2. Feed parameter - see Table 11: Feeds and Table 15: Truth table for support of 8 RF inputs.

Tun[9:8](3)

3. Tuning word - see notes in Table 14: STM8SPLNB1 EEPROM parameters for description.

Tun[7:0](3)

This command is used for the

channel selection.

ODU_PowerOff

SaTCR(1)

0x00

This command is used to put

a SaTCR in low power mode.

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