Datasheet

Maxim Integrated │ 121
MAX98090 Ultra-Low Power Stereo Audio Codec
www.maximintegrated.com
Figure 25. Playback Path DSP
Playback Path 7-Band Parametric Equalizer
The playback path DSP features a 7-band parametric
equalizer with clipping detection and a programmable
pre-attenuation amplifier (Figure 25). Each of the 7 bands
is a full, individually programmable digital biquad filter.
The chosen configuration for any given band applies to
both the left and right playback channels.
The parametric equalizer can be enabled in a 3-band,
5-band, or the full 7-band configuration (Table 50). Once
the parametric equalizer is enabled, the clip detec-
tion can be set and the level of preattenuation can be
adjusted from 0dB down to -15dB (denoted A
V_EQ
, see
Table 51). No single band biquad filter can be set to a gain
greater than ±12dB, to a Q greater than 10, or to below
a minimum f
C
that varies by filter type. See the Electrical
Characteristics table.
DAREN
DALEN
DACHP
PERFMODE
DVG[1:0]
FLEXSOUND
TECHNOLOGY DSP
DAI
SIDETONE FROM
RECORD PATH
RIGHT PLAYBACK PATH
TO THE
ANALOG
OUTPUT
MIXERS
LEFT PLAYBACK PATH
LEFT
SIDETONE
DSTS[1:0]
RIGHT
SIDETONE
DVST[3:0]
DVM
DV[3:0]
LEFT
LEVEL
RIGHT
LEVEL
LEFT
GAIN
L/R ST
LEVEL
RIGHT
GAIN
LEFT 7-BAND
PARAMETRIC
EQUALIZER
RIGHT 7-BAND
PARAMETRIC
EQUALIZER
LEFT ALC:
AUTOMATIC
LEVEL CONTROL
B0_EQ_[23:0]
B1_EQ_[23:0]
B2_EQ_[23:0]
A1_EQ_[23:0]
A2_EQ_[23:0]
EQ_BANDEN
DVEQ[3:0]
EQCLP
LEFT
FILTERS
MODE
DHPF
RIGHT ALC:
AUTOMATIC
LEVEL CONTROL
RIGHT
FILTERS
DAC
LEFT
DAC
RIGHT
DRCEN
DRCG[4:0]
DRCRLS[2:0]
DRCATK[2:0]
DRCCMP[2:0]
DRCTHC[4:0]
DRCEXP[2:0]
DRCTHE[4:0]