11/23

TDA7430 - TDA7431

5

EXAMPLES

5.1 No Incremental Bus

The TDA7430/TDA7431 receives a start condition, 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.

Figure 12.

5.2 Incremental Bus

The TDA7430/TDA7431 receives a start condition, 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.

Figure 13.

6

DATA BYTES

Address = 80(HEX) ADDR open; 82 (HEX): need to connect supply

6.1 Function Selection

Table 6. The first byte (Subaddress)

B = 1 incremental bus; active

B = 0 no incremental bus;

X = indifferent 0,1

MSB

LSB

SUBADDRESS

D7

D6

D5

D4

D3

D2

D1

D0

B

X

X

X

0

0

0

0

INPUT ATTENUATION

B

X

X

X

0

0

0

1

SURROUND & OUT & EFFECT CONTROL

B

X

X

X

0

0

1

0

PHASE RESISTOR

B

X

X

X

0

0

1

1

BASS & NATURAL BASE

BX

XX

0

1

0

0

MIDDLE & TREBLE

B

X

X

X

0

1

0

1

SPEAKER ATTENUATION "L"

B

X

X

X

0

1

1

0

SPEAKER ATTENUATION "R"

BX

XX

0

1

1

1

AUX ATTENUATION "L"

BX

XX

1

0

0

0

AUX ATTENUATION"R"

B

X

X

X

1

0

0

1

INPUT MULTIPLEXER, & AUX OUT

S

1

0

0

0

0

0

A

0

ACK

ACK

DATA

ACK

P

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU306

0

D3

SUBADDRESS

DATA

X

X

X

D2 D1 D0

S

1

0

0

0

0

0

A

0

ACK

ACK

DATA

ACK

P

MSB

LSB

MSB

LSB

MSB

LSB

CHIP ADDRESS

D95AU307

1

D3

SUBADDRESS

DATA 1 to DATA n

X

X

X

D2 D1 D0