User Manual

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MAX98089
Low-Power, Stereo Audio Codec
with FlexSound Technology
Sample Rate Converter
The sample rate conversion circuit allows for both sam-
ple rate conversion and mixing of asynchronous audio
data from DAI1 (SDIN1) and DAI2 (SDIN2). The resulting
audio can be output through DAI1 to either SDOUTS1 or
SDOUTS2. The sample rate converter can be enabled on
a per channel basis, allowing for one channel of DAI1 to
output microphone data while the other channel is outputting
sample rate converted data.
Table 12. Common NI1/NI2 Values
Note: Values in bold are exact integers that provide maximum full-scale performance.
Figure 18. Sample Rate Converter
DSTS
SIDETONE
DVST:
0dB TO -60dB
AUTOMATIC
GAIN
CONTROL
EQ1EN EQ2EN
DVEQ1:
0dB TO -15dB
DV1G:
0/6/12/18dB
DV2:
0dB TO -15dB
DCB2
5-BAND
PARAMETRIC
EQ
5-BAND
PARAMETRIC
EQ
DVEQ2:
0dB TO -15dB
MULTI BAND ALC
EXCURSION LIMITER
DV1:
0dB TO -15dB
MODE1
DVFLT
DALEN
MIXDAR
DACL
DAREN
DACR
+
NOISE GATE
MODE1
AVFLT
SRMIX_
AVLG: 0/6/
12/18dB
AVL:0dB
TO -15dB
AVRG: 0/6/
12/18dB
AVR:0dB
TO -15dB
AUDIO/
VOICE
FILTERS
AUDIO/
FILTERS
AUDIO/
VOICE
FILTERS
MIX
MIX
MIXDAL
MIX
ADREN
ADLEN
ADCR
ADCL
SAMPLE RATE
CONVERTER
PCLK (MHz)
LRCLK (kHz)
DHF1/2 = 0 DHF1/2 = 1
8 11.025 12 16 22.05 24 32 44.1 48 64 88.2 96
10
13A9 1B18 1D7E 2752 3631 3AFB 4EA5 6C61 75F7 4EA5 6C61 75F7
11
11E0 18A2 1ACF 23BF 3144 359F 477E 6287 6B3E 477E 6287 6B3E
11.2896
116A
1800
1A1F 22D4
3000
343F 45A9
6000
687D 45A9
6000
687D
12
1062 1694 1893 20C5 2D29 3127 4189 5A51 624E 4189 5A51 624E
12.288 1000
160D
1800 2000
2C1A
3000 4000
5833
6000 4000
5833
6000
13
0F20 14D8 16AF 1E3F 29AF 2D5F 3C7F 535F 5ABE 3C7F 535F 5ABE
16
0C4A 10EF 126F 1893 21DE 24DD 3127 43BD 49BA 3127 43BD 49BA
16.9344
0B9C
1000
116A 1738
2000
22D4 2E71
4000
45A9 2E71
4000
45A9
18.432
0AAB 0EB3
1000
1555 1D66
2000
2AAB 3ACD
4000
2AAB 3ACD
4000
20
09D5 0D8C 0EBF 13A9 1B18 1D7E 2752 3631 3AFB 2752 3631 3AFB