max98088 Maxim Integrated Products, Inc., max98088 Datasheet - Page 85

• Manufacturer Part Number: max98088
• Description: Stereo Audio Codec With Flexsound Technology
• Manufacturer: Maxim Integrated Products, Inc.

Table 13. Sample Rate Converter
Each digital signal path in the IC includes options for
defining the path bandwidth (Figure 19). The playback
and record paths connected to DAI1 support both voice
and music filtering while the playback path connected to
DAI2 supports music filtering only.
The voice IIR filters provide greater than 70dB stopband
attenuation at frequencies above f
Three selectable highpass filters eliminate unwanted
low-frequency signals.
Figure 19. Digital Passband Filtering Block Diagram
REGISTER
0x21
BIT
4
3
2
1
0
ADLEN
ADREN
ADCL
ADCR
SRMIX_MODE
SRMIX_ENL
SRMIX_ENR
SRC_ENR
SRC_ENL
AUTOMATIC
CONTROL
NAME
GAIN
AVLG: 0/6/
TO -15dB
Passband Filtering
12/18dB
AVL:0dB
SIDETONE
S
SRMIX_
MODE
MODE1
/2 to reduce aliasing.
AVFLT
DSTS
SAMPLE RATE
NOISE GATE
CONVERTER
FILTERS
AUDIO/
Sample Rate Mix Mode
0 = (DAI1 + DAI2)
1 = (DAI1 + DAI2)/2
Sample Rate Mix Enable
0 = SRC mix disable
1 = SRC mix enable
Sample Rate Converter Enable
0 = Sample rate converter disable
1 = Sample rate converter enable
VOICE
MIX
with FLEXSOUND Technology
DVST:
0dB TO -60dB
AVRG: 0/6/
12/18dB
AVR:0dB
TO -15dB
PARAMETRIC
5-BAND
EQ
+
EQ1EN
EXCURSION LIMITER
MULTI BAND ALC
DV1G:
0/6/12/18dB
DVEQ1:
0dB TO -15dB
Use music mode when processing high-fidelity audio
content. The music FIR filters reduce power consump-
tion and are linear phase to maintain stereo imaging.
An optional DC-blocking filter is available to eliminate
unwanted DC offset.
In music mode, a second set of FIR filters are available
to support sample rates greater than 50kHz. The filters
can be independently selected for DAI1 and DAI2 and
support both the playback and record audio paths.
PARAMETRIC
5-BAND
DV2:
0dB TO -15dB
DV1:
0dB TO -15dB
Stereo Audio Codec
EQ
EQ2EN
DESCRIPTION
DVEQ2:
0dB TO -15dB
DCB2
MODE1
DVFLT
FILTERS
FILTERS
AUDIO/
AUDIO/
VOICE
MIXDAL
MIXDAR
MIX
MIX
DALEN
DAREN
DACR
DACL
85