TDA7440 データシートの表示（PDF） - STMicroelectronics

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TDA7440

TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR

STMicroelectronics 

TDA7440D

5.2 POWER ON RESET CONDITION

Table 6.

INPUT SELECTION

INPUT GAIN

VOLUME

BASS

TREBLE

SPEAKER

IN2

28dB

MUTE

0dB

2dB

MUTE

5.3 DATA BYTES

Address = 88 HEX (ADDR:OPEN).

Table 7. FUNCTION SELECTION: First byte (subaddress)

MSB

LSB

SUBADDRESS

D7

D6

D5

D4

D3

D2

D1

D0

X

X

X

B

0

0

0

0 INPUT SELECT

X

X

X

B

0

0

0

1 INPUT GAIN

X

X

X

B

0

0

1

0 VOLUME

X

X

X

B

0

0

1

1 BASS

X

X

X

B

0

1

0

0 NOT USED

X

X

X

B

0

1

0

1 TREBLE

X

X

X

B

0

1

1

0 SPEAKER ATTENUATE "R"

X

X

X

B

0

1

1

1 SPEAKER ATTENUATE "L"

B = 1: INCREMENTAL BUS ACTIVE

B = 0: NO INCREMENTAL BUS

X = DON’T CARE

In Incremental Bus Mode, the "not used" function must be addressed in any case. For example to refresh

"Volume = 0dB" and Speaker_R = -40dB", the following bytes must be sent:

Table 8.

SUBADDRESS

VOLUME DATA

BUS DATA

NOT USED DATA

TREBLE DATA

SPEAKER_R DATA

XXX10010

X0000000

XXXX1111

XXXX1111

XXXX1111

X0000010

Table 9. INPUT SELECTION

MSB

LSB

D7

D6

D5

D4

D3

D2

D1

D0

X

X

X

X

X

X

0

0

X

X

X

X

X

X

0

1

X

X

X

X

X

X

1

0

X

X

X

X

X

X

1

1

INPUT MULTIPLEXER

IN4

IN3

IN2

IN1

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