TDA7429T datasheet(10/20 Pages) STMICROELECTRONICS

Teilenummer	TDA7429T

Bauteilbeschribung	DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX

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SOFTWARE SPECIFICATION

Interface Protocol

The interface protocol comprises:

A start condition (S)

A chip address byte, containing the TDA7429

address

A subaddress bytes

A sequence of data (N byte + achnowledge)

A stop condition (P)

ACK = Achnowledge

S = Start

P = Stop

A = Address

B = Auto Increment

S

100000

A

0

ACK

DATA

ACK

P

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU226A

B

DATA

SUBADDRESS

DATA 1 to DATA n

EXAMPLES

No Incremental Bus

The TDA7429 receives a start condition, the cor-

rect chip address, a subaddress with the MSB = 0

(no incremental bus), N-datas (all these datas

concern the subaddress selected), a stop condi-

tion.

S

100000

A

0

ACK

DATA

ACK

P

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU306

0D3

SUBADDRESS

DATA

X

D2 D1 D0

Incremental Bus

The TDA7429 receive s a start condition, the cor-

rect chip address, a subaddress with the MSB = 1

(incremental bus): now it is in a loop condition

with an autoincrease of the subaddress whereas

SUBADDRESS from ”1XXX1010” to ”1XXX1111”

of DATA are ignored.

The DATA 1 concern thesubaddress sent, and

the DATA 2 concern the subaddress sent plus

one in the loop etc, and at the end it receivers the

stop condition.

S

100000

A

0

ACK

DATA

ACK

P

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU307

1D3

SUBADDRESS

DATA 1 to DATA n

X

D2 D1 D0

TDA7429S - TDA7429T

10/20

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