ST7LNB0

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4 SUPPORTED DiSEqC™ COMMANDS

Table 4. ST7LNB0 DiSEqC™ supported commands

Note:

After a power-on, the ST7LNB0 responds to backwards compatible signalling (13/18 V, 22 kHz, tone

burst) until a valid DiSEqC frame is detected.

In order to return to backwards compatible mode, a RESET command must be sent.

Command

number (Hex

byte)

Command name

Command Function

00h

RESET

Reset DiSEqC™ microcontroller

01h

clr RESET

Clear the “RESET” flag

02h

STANDBY

Switch peripheral power off

03h

Power on

Switch peripheral power supply off

04h

Set Cont

Set contention flag

05h

Contend

Return address only if contention flag is set

06h

Clr Cont

Clear contention flag

07h

Address

Return address unless contention flag is set

08h

Move C

Change address only if contention flag is set

09h

Move

Change address unless contention flag is set

10h

STATUS

Read STATUS register

11h

Config

Read Configuration register

14h

Group 0

Read switching state (committed port)

15h

Group 1

Read switching state (uncommitted port)

20h

Set Lo

Select the low Local oscillator frequency

21h

Set VR

Select the vertical polarization

22h

Set Pos A

Select satellite position A

23h

Set SO A

Select switch Option A

24h

Set Hi

Select the Hi local oscillator frequency

25h

Set HL

Select the Horizontal polarization

26h

Set Pos B

Select satellite position B

27h

Set SO B

Select the switch Option B

28h

Set S1 A

Select switch S1 input A

29h

Set S2 A

Select switch S2 input A

2Ah

Set S3 A

Select switch S3 input A

2Bh

Set S4 A

Select switch S4 input A

2Ch

Set S1 B

Select switch S1 input B

2Dh

Set S2 B

Select switch S2 input B

2Eh

Set S3 B

Select switch S3 input B

2Fh

Set S4B

Select switch S4 input B

38h

Write N0

Write to port group 0 (committed switches)

39h

Write N1

Write to port group 1 (uncommitted switches)

51h

LO

Read current L.O frequency table entry number

52h

LO Lo

Read Lo L.O frequency table entry number

53h

LO Hi

Read Hi L.O frequency table entry number