7430 datasheet(10/21 Pages) STMICROELECTRONICS

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Giải thích chi tiết về linh kiện	DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX AND VOICE CANCELLER

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SOFTWARE SPECIFICATION

Interface Protocol

The interface protocol comprises:

A start condition (S)

A chip address byte, containing the TDA7430

/TDA7431 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 TDA7430 /TDA7431 receives a start condi-

tion, the correct chip address, a subaddress with

the MSB = 0 (no incremental bus), N-datas (all

these datas concern the subaddress selected), a

stop condition.

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 TDA7430 /TDA7431 receive s a start condi-

tion, the correct 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

TDA7430 - TDA7431

10/21

Số phần tương tự - 7430

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