DocID023065 Rev 3

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LNBH29

I²C interface protocol

ACK = Acknowledge

S = Start

P = Stop

R/W = 1/0, Read/Write bit

X = 0/1, set the values to select the chip address (see Chip Address pin selection table) and

to select the register address (0x0 for STATUS register and 0x1 for DATA register).

7.3

DATA register

The DATA register can be addressed both in Write and Read mode. In Read mode it returns

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

Table 6 provides the DATA register values with relevant function description of each bit.

a.

The reading procedure can start from any register address (STATUS or DATA) by simply setting the X values

in the register address byte (after the first chip address in Figure 11). It can be also stopped from the master by

sending a stop condition after any acknowledge bit.

AM11894v1

S

0

0010

0

X

0000000

X

P

S

0

0010

0

X

MSB

LSB

CHIP ADDRESS

MSB

LSB

REGISTER ADDRESS

MSB

LSB

CHIP ADDRESS

MSB

LSB

DATA

Add=0x1

MSB

LSB

STATUS

Add=0x0

P