CS3318 datasheet(32/44 Pages) CIRRUS

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DS693F1

CS3318

7.2

¼ dB Control - Address 09h

7.2.1

¼ dB Control (Bit 0 - 7)

Default = 0

Function:

When set, ¼ dB of gain will be added to each bit’s respective channel. The volume changes are im-

plemented as dictated by the ZCMode[1:0] and TimeOut[2:0] bits in the Device Config 2 register (see

“Device Configuration 2 - Address 0Ch” on page 34).

It should be noted that input values outside the CS3318’s analog range of +22 dB to -96 dB are valid;

however, the volume of each channel will be limited to the CS3318’s analog range (see “Volume Lim-

its” on page 20).

Table 6 shows example volume settings using the ¼ dB control.

543

Quarter8

Quarter7

Quarter6

Quarter5

Quarter4

Quarter3

Quarter2

Quarter1

Volume Control Register

Setting (Reg 01h - 08h)

Corresponding QuarterX

Bit Setting

Individual VolumeChX (dB)

11111110

+22

11111101

+21.75

11111101

+21.5

11111100

+21.25

11111100

+21

11010100

11010011

+0.75

11010011

+0.5

11010010

+0.25

11010010

11010001

-0.25

11010001

-0.5

11010000

-0.75

11010000

-1

00010100

-95

00010011

-95.25

00010011

-95.5

00010010

-95.75

00010010

-96

Table 6. Example Volume Settings

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