TDA7407 datasheet(34/46 Pages) STMICROELECTRONICS

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I2C Bus interface description

TDA7407

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I2C Bus interface description

6.1

Interface protocol

The interface protocol comprises:

–

a start condition (S)

–

a chip address byte (the LSB bit determines read / write transmission)

–

a subaddress byte

–

a sequence of data (N-bytes + acknowledge)

–

a stop condition (P

Table 10.

Addresses

D97AU627

S = Start

ACK = Acknowledge

AZ = AutoZero Remain

T = Testing

I = Auto increment

P = Stop

Max clock speed 500kbits/s

The transmitted data is automatically updated after each ACK. Transmission can be

repeated without new chip address.

6.2

Auto increment

If bit I in the subaddress byte is set to "1", the autoincrement of the subaddress is enabled.

Table 11.

Transmitted data (send mode)

SM = Soft mute activated

ST = Stereo

X = Not Used

Chip address

Subaddress

Data 1 to data n

MSB

LSB

MSB

LSB

MSB

LSB

000110 R/W ACK

AZ T

I A3 A2 A1 A0 ACK

DATA

ACK P

MSB

LSB

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