Datasheet

LNBH25L I²C interface protocol

Doc ID 022634 Rev 2 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 0/1

Output voltage selection bits. (Refer to

Tabl e 1 3

)

Bit 1 VSEL2 0/1

Bit 2 VSEL3 0/1

Bit 3 VSEL4 0/1

Bit 4 N/A 0 Reserved. Keep to “0”

Bit 5 N/A 0 Reserved. Keep to “0”

Bit 6 N/A 0 Reserved. Keep to “0”

Bit 7

(MSB)

N/A 0 Reserved. Keep to “0”

Table 7. Data 2 (read/write register. Register address = 0X3)

BIT Name Value Description

Bit 0

(LSB)

TEN

1 22 kHz tone enabled. Tone output controlled by the DSQIN pin

0 22 kHz tone output disabled

Bit 1 N/A 0 Reserved. Keep to “0”

Bit 2 EXTM

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