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TDA743004

THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR

STMicroelectronics 

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.

CHIP ADDRESS

SUBADDRESS

DATA

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

LSB

ACK P

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.

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

6 DATA BYTES

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

6.1 Function Selection

Table 6. The first byte (Subaddress)

MSB

D7

D6

D5

D4

D3

D2

B

X

X

X

0

0

B

X

X

X

0

0

B

X

X

X

0

0

B

X

X

X

0

0

B

X

X

X

0

1

B

X

X

X

0

1

B

X

X

X

0

1

B

X

X

X

0

1

B

X

X

X

1

0

B

X

X

X

1

0

B = 1 incremental bus; active

B = 0 no incremental bus;

X = indifferent 0,1

LSB

SUBADDRESS

D1

D0

0

0 INPUT ATTENUATION

0

1 SURROUND & OUT & EFFECT CONTROL

1

0 PHASE RESISTOR

1

1 BASS & NATURAL BASE

0

0 MIDDLE & TREBLE

0

1 SPEAKER ATTENUATION "L"

1

0 SPEAKER ATTENUATION "R"

1

1 AUX ATTENUATION "L"

0

0 AUX ATTENUATION"R"

0

1 INPUT MULTIPLEXER, & AUX OUT

11/23

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