7431 查看數據表（PDF） - STMicroelectronics

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7431

DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX AND VOICE CANCELLER

STMicroelectronics 

TDA7430 - TDA7431

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)

CHIP ADDRESS

SUBADDRESS

DATA 1 to DATA n

MSB

LSB

MSB

S 1 0 0 0 0 0 A 0 ACK B

D95AU226A

DATA

LSB

MSB

ACK

DATA

LSB

ACK P

ACK = Achnowledge

S = Start

P = Stop

A = Address

B = Auto Increment

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.

CHIP ADDRESS

SUBADDRESS

MSB

LSB

MSB

LSB

MSB

S 1 0 0 0 0 0 A 0 ACK 0 X X X D3 D2 D1 D0 ACK

D95AU306

DATA

DATA

LSB

ACK P

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.

CHIP ADDRESS

SUBADDRESS

DATA 1 to DATA n

MSB

LSB

MSB

LSB

MSB

S 1 0 0 0 0 0 A 0 ACK 1 X X X D3 D2 D1 D0 ACK

D95AU307

DATA

LSB

ACK P

10/21

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