DATA BYTE SPECIFICATION

X = not relevant; set to ”1” during testing

MSB

LSB

FUNCTION

D7

D6

D5

D4

D3

D2

D1

D0

X

X

1

0

0

0

not used

X

X

1

0

0

1

IN 2

X

X

1

0

1

0

IN 1

X

X

1

0

1

1

AM mono

X

X

1

1

0

0

not used

X

X

1

1

0

1

IN 3

X

X

1

1

1

0

not allowed

X

X

1

1

1

1

not allowed

X

X

1

0

0

11.25dB gain

X

X

1

0

1

7.5dB gain

X

X

1

1

0

3.75dB gain

X

X

1

1

1

0dB gain

For example to select the IN 2 input with a gain of 7.5dB the Data Byte is: X X 1 0 1 0 0 1

Input Selector

MSB

LSB

FUNCTION

D7

D6

D5

D4

D3

D2

D1

D0

X

X

X

10

00

0

0dB

X

X

X

1

0

0

0

1

-1.25dB

X

X

X

1

0

0

1

0

-2.5dB

X

X

X

1

0

0

1

1

-3.75dB

X

X

X

1

0

1

0

0

-5dB

X

X

X

1

0

1

0

1

-6.25dB

X

X

X

1

0

1

1

0

-7.5dB

X

X

X

1

0

1

1

1

-8.75dB

X

X

X

1

1

0

0

0

-10dB

X

X

X

1

1

0

0

1

-11.25dB

X

X

X

1

1

0

1

0

-12.5dB

X

X

X

1

1

0

1

1

-13.75dB

X

X

X

1

1

1

0

0

-15dB

X

X

X

1

1

1

0

1

-16.25dB

X

X

X

1

1

1

1

0

-17.5dB

X

X

X

1

1

1

1

1

-18.75dB

For example to select -17.5dB attenuation the Data Byte is: X X X1 1 1 1 0

Volume 2

TDA7348

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