TDA7411 datasheet(30/43 Pages) STMICROELECTRONICS

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TDA7411

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I2C BUS INTERFACE DESCRIPTION

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)

S = Start

ACK = Acknowledge

AZ = AutoZero-Remain

T = Testing

I = Autoincrement

P = Stop

MAX CLOCK SPEED 500kbits/s

Auto increment

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

TRANSMITTED DATA (send mode)

SM = Soft mute activated

ST = Stereo

X = Not Used

The transmitted data is automatically updated after each ACK.

Transmission can be repeated without new chip address.

Reset Condition

A power on reset is invoked if the supply voltage is below than 3.5V. After that the following data are written

automatically into the registers of all sub addresses:

The programming after POR is marked bold face / underlined in the programming tables. With that pro-

gramming all the outputs are muted to Vref.

MSB

LSB

MSB

LSB

111110

D03AU1526

0 R/W ACK

ACK

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

SUBADDRESS

DATA 1 to DATA n

AZ T

A3 A2 A1 A0

DATA

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