MAX98090AETL+ Maxim Integrated, MAX98090AETL+ Datasheet - Page 104
MAX98090AETL+
Manufacturer Part Number
MAX98090AETL+
Description
Interface - CODECs 5V 130mW Stereo Headphone Amp
Manufacturer
Maxim Integrated
Datasheet
1.MAX98090BETL.pdf
(166 pages)
Specifications of MAX98090AETL+
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MAX98090
fixed and cannot be manually changed. In this mode,
when the sample rate is set to 8kHz or 16kHz, voice filters
(IIR) are automatically selected and the ADC oversam-
pling rate is fixed to 128. For any other selected sample
rate, music filters (FIR) are selected and the ADC overs-
ampling rate is configured to insure that the pre-scaled
master clock frequency is greater than or equal to 256 x
fS. If f
set to 128, otherwise OSR is set to 64. Table 38 provides
a complete lookup table for the resulting quick configura-
tion mode settings.
Table 38. Quick Configuration Mode Lookup
Table 39. Clock Mode Configuration Register
www.maximintegrated.com
11.2896MHz
BIT
12.288MHz
7
6
5
4
3
2
1
0
19.2MHz
256 x f
26MHz
13MHz
12MHz
f
SELECTED MASTER CLOCK
MCLK
PCLK
S
FREQ[3:0]
≥ 256 x f
ADDRESS: 0x1C
FREQUENCY
USE_MI
NAME
DIVIDER
—
—
—
2
1
1
1
1
1
1
2
S
then the oversampling rate (OSR) is
11.2896MHz
12.288Mhz
19.2Mhz
256 x f
128 x f
12MHz
TYPE POR
13Mhz
13Mhz
f
R/W
R/W
PCLK
—
—
—
S
S
—
—
—
0
0
0
0
0
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
Exact Integer Sampling Frequency (LRCLK) Configuration
Use MI[15:0] in Addition to NI[14:0] to set an Accurate Frequency Ratio
Configure the DAI for specific PCLK to LRCLK ratios for f
(voice modes). Any setting other than 0x0 overrides manual ratio mode settings.
0000: Disabled
When enabled, the following PCLK to LRCLK ratios are available:
1000: f
1010: f
1100: f
1110: f
0 : MI = 65536; NI = (f
1 : MI is set to the value of MI[15:0] (Table 35 and Table 36).
VOICE FILTER (IIR)
—
8
PCLK
PCLK
PCLK
PCLK
= 19.2MHz, f
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
= 16MHz, f
= 12MHz, f
= 13MHz, f
16
—
LRCLK
LRCLK
LRCLK
LRCLK
SELECTED SAMPLE RATE (kHz)
Exact Integer Mode
In exact integer mode, the master clock frequency and sam-
ple rate can be set to one of eight preprogrammed combi-
nations (Table 39). There are four different available mas-
ter clock frequencies (12MHz/13MHz/16MHz/19.2MHz),
each of which can be selected with a sampling rate (f
of either 8kHz or 16kHz. Once a configuration is selected,
the NI and MI bits are internally programmed to the cor-
rect ratio. These combinations are primarily intended for
standard or wideband voice applications.
LRCLK
Ultra-Low Power Stereo Audio Codec
1XXX: Enabled
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
/ f
= 8kHz
= 8kHz
= 8kHz
PCLK
= 8kHz
32
—
DESCRIPTION
) x 65536 x 96
—
—
—
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
1001: f
1011: f
1101: f
1111: f
MUSIC FILTER (FIR)
44.1
—
Other combinations are reserved
PCLK
PCLK
PCLK
PCLK
S
= 19.2MHz, f
= 13MHz, f
= 16MHz, f
= 12MHz, f
= 8kHz/16kHz operation
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 128
OSR = 64
OSR = 64
48
—
Maxim Integrated │ 104
LRCLK
LRCLK
LRCLK
LRCLK
OSR = 64
OSR = 64
OSR = 64
OSR = 64
OSR = 64
OSR = 64
OSR = 64
= 16kHz
= 16kHz
= 16kHz
= 16kHz
96
—
S
)
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