CS4299 datasheet(21/52 Pages) CIRRUS

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CS4299

4.3

Alternate Volume Register (Index 04h)

Mute

Alternate Mute. Setting this bit mutes the ALT_LINE_OUT_L/R output signals.

ML[4:0]

Alternate Volume Left. These bits control the left alternate output volume. Each step corre-

sponds to 1.5 dB gain adjustment, with 00000 = 0 dB. The total range is 0 dB to -46.5 dB atten-

uation. See Table 2 for further attenuation levels.

ML5

Alternate Volume Left Max Attenuation. Setting ML5 sets the left channel attenuation to

-46.5 dB by forcing ML[4:0] to a ‘1’ state. ML[5:0] will read back 011111 when ML5 has been

‘set’. Table 2 summarizes this behavior.

MR[4:0]

Alternate Volume Right. These bits control the right alternate output volume. Each step corre-

sponds to 1.5 dB gain adjustment, with 00000 = 0 dB. The total range is 0 dB to -46.5 dB atten-

uation. See Table 2 for further attenuation levels.

MR5

Alternate Volume Right Max Attenuation. Setting MR5 sets the right channel attenuation to

-46.5 dB by forcing MR[4:0] to a ‘1’ state. MR[5:0] will read back 011111 when MR5 has been

‘set’. Table 2 summarizes this behavior.

Default

8000h. This value corresponds to 0 dB attenuation and Mute ‘set’.

4.4

Mono Volume Register (Index 06h)

Mute

Mono Mute. Setting this bit mutes the MONO_OUT signal.

MM[5:0]

Mono Volume. These bits control the mono output volume. Each step corresponds to 1.5 dB

gain adjustment, with a total available range from 0 dB to -46.5 dB attenuation. See Table 2 for

further attenuation levels.

MM5

Mono Volume Max Attenuation. Setting the MM5 bit sets the mono attenuation to -46.5 dB by

forcing MM[4:0] to a ‘1’ state. MM[5:0] will read back 011111 when MM5 has been ‘set’. Table 2

summarizes this behavior.

Default

8000h. This value corresponds to 0 dB attenuation and Mute ‘set’.

D15

D14

D13

D12

D11

D10

Mute

ML5

ML4

ML3

ML2

ML1

ML0

MR5

MR4MR3

MR2MR1

MR0

Mx[5:0]

Write

Mx[5:0]

Read

Gain

Level

000000

0 dB

000001

-1.5 dB

……

...

011111

-46.5 dB

100000

011111

-46.5 dB

...

111111

011111

-46.5 dB

Table 2. Analog Mixer Output Attenuation

D15

D14

D13

D12

D11

D10

Mute

000

MM5

MM4

MM3

MM2

MM1

MM0

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