TDA7429 データシートの表示（PDF） - STMicroelectronics

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TDA7429

DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX

STMicroelectronics 

TDA7429

5 EXAMPLES

5.1 No Incremental Bus

The TDA7429 receives a start condition, the correct chip address, a subaddress with the MSB = 0 (no incre-

mental 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 TDA7429 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

t(s concern the subaddress sent plus one in the loop etc, and at the end it receivers the stop condition.

uc Figure 13.

rod CHIP ADDRESS

SUBADDRESS

DATA 1 to DATA n

P MSB

LSB

MSB

LSB

MSB

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

le D95AU307

DATA

LSB

ACK P

bso 6 DATA BYTES

O Address = 80(HEX)

t(s) - 6.1 Function Selection

uc Table 6. The first byte (Subaddress)

rod MSB

P D7

D6

D5

D4

D3

D2

te B

X

X

X

0

0

le B

X

X

X

0

0

o B

X

X

X

0

0

sB

X

X

X

0

0

ObB

X

X

X

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

B

X

X

X

0

1

0

1 SPEAKER ATTENUATION "L"

B

X

X

X

0

1

1

0 SPEAKER ATTENUATION "R"

B

X

X

X

0

1

1

1 AUX ATTENUATION "L"

B

X

X

X

1

0

0

0 AUX ATTENUATION"R"

B

X

X

X

1

0

0

1 INPUT MULTIPLEXER, & AUX OUT

B = 1 incremental bus; active

B = 0 no incremental bus;

X = indifferent 0,1

11/22

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