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CS4297A

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 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Mute 0 ML5

ML4 ML3 ML2 ML1 ML0 0 0 MR5 MR4MR3MR2MR1MR0

Mx[5:0]

Write

Mx[5:0]

Read

Gain

Level

000000 000000 0 dB

000001 000001 -1.5 dB

……...

011111 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 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Mute000000000MM5

MM4 MM3 MM2 MM1 MM0

DS318PP6 21

CS4297A

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