CS44600-CQZ 参数 Datasheet PDF下载

CS44600

7.8

Master Volume Control - Integer (address 07h)

6

MSTR_IVOL6

5

MSTR_IVOL5

4

MSTR_IVOL4

3

MSTR_IVOL3

2

MSTR_IVOL2

1

MSTR_IVOL1

0

MSTR_IVOL0

7

MSTR_IVOL7

7.8.1

Master Volume Control - Integer (MSTR_IVOL[7:0])

Default = 00000000

Function:

The Master Volume Control - Integer register allows global control of the signal levels on all channels in

1 dB increments from +24 to -127 dB. Volume settings are decoded as shown in Table 6. The volume

changes are implemented as specified by the Soft and Zero Cross bits (SZC[1:0]). All volume settings

greater than 00011000b are equivalent to +24 dB. Binary values for integer volume settings less than

0 dB are in two’s complement form.

MSTR_IVOL[7:0]

0001 1000

0001 0111

0000 0001

0000 0000

1111 1111

1111 1110

1000 0001

Hex Value

18

17

01

00

FF

FE

81

Volume Setting

+24 dB

+23 dB

+1 dB

0 dB

-1 dB

-2 dB

-127 dB

Table 6. Master Integer Volume Settings

7.9

Master Volume Control - Fraction (address 08h)

6

RESERVED

5

RESERVED

4

RESERVED

3

RESERVED

2

RESERVED

1

MSTR_FVOL1

0

MSTR_FVOL0

7

RESERVED

7.9.1

Master Volume Control - Fraction (MSTR_FVOL[1:0])

Default = 00

00 - +0.00 dB

01 - +0.25 dB

10 - +0.50 dB

11 - +0.75 dB

Function:

The Master Volume Control - Fraction register is an additional offset to the value in the Master Volume

Control - Integer register and allows global control of the signal levels on all channels in 0.25 dB incre-

ments. Volume settings are decoded as shown in Table 7. These volume changes are implemented as

specified by the Soft and Zero Cross bits (SZC[1:0]). All volume settings greater than 00011000b are

equivalent to +24 dB. Binary values for integer and fractional volume settings less than 0 dB are in two’s

complement form.

To calculate from a positive decimal integer:fraction value to a binary positive integer:fraction value, do

the following:

1. Convert the decimal integer to binary. This is MSTR_IVOL[7:0].

2. Select the bit representation of the desired 0.25 fractional increment. This is MSTR_FVOL[1:0].

To calculate from a negative decimal integer:fraction value to a binary, 2’s complement integer:fraction

value, do the following:

DS633F1

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