Manual

CS4205
28 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 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
Mute000000000MM5
MM4 MM3 MM2 MM1 MM0
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0000BA3BA2BA1BA00000TR3TR2TR1TR0
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