CS4294SLASHCS4298 datasheet(28/81 Pages) CIRRUS

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CS4205

DS489PP4

5.3

Mono Volume Register (Index 06h)

Mute

Mono Mute. Setting this bit mutes the MONO_OUT output signal.

MM[5:0]

Mono Volume Control. The MM[5:0] bits control the mono output volume. Each step corre-

sponds to 1.5 dB gain adjustment, with a total available range from 0 dB to -46.5 dB attenu-

ation. 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’. See Table 4 on page 27 for

further attenuation levels.

Default

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

5.4

Master Tone Control Register (Index 08h)

BA[3:0]

Bass Control. The BA[3:0] bits are used to control the bass gain in the effects engine. Each

step corresponds to 1.5 dB gain adjustment, with a total available range from +10.5 dB to

-10.5 dB gain. See Table 5 for further details. The center frequency from which the gain is

measured defaults to 100 Hz for bass, and may be changed using the LPFS[1:0] bits in the

Signal Processing Engine Control Register (Index 6Eh, Address 08h).

TR[3:0]

Treble Control. The TR[3:0] bits are used to control the treble gain in the effects engine. Each

step corresponds to 1.5 dB gain adjustment, with a total available range from +10.5 dB to

-10.5 dB gain. See Table 5 for further details. The center frequency from which the gain is

measured defaults to 10 kHz for treble, and may be changed using the HPFS[1:0] bits in the

Signal Processing Engine Control Register (Index 6Eh, Address 08h).

Default

0F0Fh. This value corresponds to bypass of bass and treble gain.

D15

D14

D13

D12

D11

D10

Mute

000000000

MM5

MM4

MM3

MM2

MM1

MM0

D15

D14

D13

D12

D11

D10

0000

BA3

BA2

BA1

BA0

0000

TR3

TR2

TR1

TR0

TR3..TR0

BA3..BA0

Gain

Level

0000

+10.5 dB

0001

+9 dB

…

...

0110

+1.5 dB

0111

0 dB

1000

-1.5 dB

...

1101

-9 dB

1110

-10.5 dB

1111

bypass

Table 5. Tone Control Values

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