MAX98090AETL+ Maxim Integrated, MAX98090AETL+ Datasheet - Page 104

• Manufacturer Part Number: MAX98090AETL+
• Description: Interface - CODECs 5V 130mW Stereo Headphone Amp
• Manufacturer: Maxim Integrated

Specifications of MAX98090AETL+

• Rohs: yes

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
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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
)