CS4299-KQ Просмотр технического описания (PDF) - Cirrus Logic

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CS4299-KQ

CrystalClear SoundFusion™ Audio Codec ’97

Cirrus Logic 

CS4299

4.3 Alternate Volume Register (Index 04h)

D15 D14 D13 D12 D11 D10 D9 D8 D7

Mute 0 ML5 ML4 ML3 ML2 ML1 ML0 0

D6 D5 D4 D3 D2 D1 D0

0 MR5 MR4 MR3 MR2 MR1 MR0

Mute

ML[4:0]

ML5

MR[4:0]

MR5

Default

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

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.

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.

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.

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.

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

Mx[5:0]

Write

000000

000001

…

011111

100000

...

111111

Mx[5:0]

Read

000000

000001

…

011111

011111

...

011111

Gain

Level

0 dB

-1.5 dB

...

-46.5 dB

-46.5 dB

...

-46.5 dB

Table 2. Analog Mixer Output Attenuation

4.4 Mono Volume Register (Index 06h)

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Mute 0

0

0

0

0

0

0

0

0 MM5 MM4 MM3 MM2 MM1 MM0

Mute

MM[5:0]

MM5

Default

Mono Mute. Setting this bit mutes the MONO_OUT signal.

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.

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.

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

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