LNBH26LPQR datasheet(17/28 Pages) STMICROELECTRONICS

17 / 28 page

LNBH26L

I²C interface protocol

Doc ID 022876 Rev 1

17/28

7.3

Data registers

The DATA 1..4 registers can be addressed both in write and read mode. In read mode they

return the last writing byte status received in the previous write transmission.

The following tables provide the register address values of Data 1..4 and a function

description of each bit.

N/A = Reserved bit.

All bits reset to “0” at power-on.

N/A = Reserved bit.

All bits reset to “0” at power-on.

Table 6.

DATA 1 (read/write register. Register address = 0X2)

Bit

Name

Value

Description

Bit 0

(LSb)

VSEL1-A

0/1

Channel A

output voltage selection bits.

(Refer to

Table 13)

Bit 1

VSEL2-A

0/1

Bit 2

VSEL3-A

0/1

Bit 3

VSEL4-A

0/1

Bit 4

VSEL1-B

0/1

Channel B

output voltage selection bits.

(Refer to

Table 13)

Bit 5

VSEL2-B

0/1

Bit 6

VSEL3-B

0/1

Bit 7

(MSb)

VSEL4-B

0/1

Table 7.

DATA 2 (read/write register. Register address = 0X3)

Bit

Name

Value

Description

Bit 0

(LSb)

TEN-A

22 kHz tone enabled. Tone output controlled by the DSQIN pin

22 kHz tone output disabled

Bit 1

N/A

Reserved. Keep to “0”.

Bit 2

EXTM-A

DSQIN input pin is set to receive external 22 kHz TTL signal source

DSQIN input pin is set to receive external DiSEqC envelope TTL signal

Bit 3

N/A

Reserved. Keep to “0”.

Bit 4

TEN-B

22 kHz tone enabled. Tone output controlled by the DSQIN pin

22 kHz tone output disabled

Bit 5

N/A

Reserved. Keep to “0”.

Bit 6

EXTM-B

DSQIN input pin is set to receive external 22 kHz TTL signal source

DSQIN input pin is set to receive external DiSEqC envelope TTL signal

Bit 7

(MSb)

N/A

Reserved. Keep to “0”.

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