CS4205 Datasheet, PDF (28/80 Pages) Cirrus Logic – CrystalClear Audio Codec 97 with Portable Computing

CS4205
5.3 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
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)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0 BA3 BA2 BA1 BA0 0
0
0
0 TR3 TR2 TR1 TR0
BA[3:0]
TR[3:0]
Default
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).
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).
0F0Fh. This value corresponds to bypass of bass and treble gain.
TR3..TR0
BA3..BA0
0000
0001
…
0110
0111
1000
...
1101
1110
1111
Gain
Level
+10.5 dB
+9 dB
...
+1.5 dB
0 dB
-1.5 dB
...
-9 dB
-10.5 dB
bypass
Table 5. Tone Control Values
28
DS489PP2