max98088 Maxim Integrated Products, Inc., max98088 Datasheet - Page 81

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

The digital signal paths in the IC require a master
clock (MCLK) between 10MHz and 60MHz to function.
Internally, the MAX98088/MAX98089 requires a clock
between 10MHz and 20MHz. A prescaler divides MCLK
by 1, 2, or 4 to create the internal clock (PCLK). PCLK is
used to clock all portions of the IC.
The MAX98088/MAX98089 includes two digital audio
signal paths, both capable of supporting any sample
rate from 8kHz to 96kHz. Each path is independently
configured to allow different sample rates. To accom-
modate a wide range of system architectures, three main
clocking modes are supported:
U PLL Mode: When operating in slave mode, enable
Table 11. Clock Control Registers
REGISTER
0x11/0x19
the PLL to lock onto any LRCLK input. This mode
requires the least configuration, but provides the
lowest performance. Use this mode to simplify initial
setup or when normal mode and exact integer mode
cannot be used.
0x10
BIT
5
4
7
6
5
4
SR1/SR2
PSCLK
NAME
MCLK Prescaler
Generates PCLK, which is used by all internal circuitry.
00 = PCLK disabled
01 = 10MHz P MCLK P 20MHz (PCLK = MCLK)
10 = 20MHz P MCLK P 40MHz (PCLK = MCLK/2)
11 = 40MHz P MCLK P 60MHz (PCLK = MCLK/4)
DAI1/DAI2 Sample Rate
Used by the ALC to correctly set the dual-band crossover frequency and the excursion
limiter to set the predefined corner frequencies.
Clock Control
VALUE
with FLEXSOUND Technology
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
SAMPLE RATE
U Normal Mode: This mode uses a 15-bit clock divider
U Exact Integer Mode (DAI1 only): In both master and
U DAC Low-Power Mode: This mode bypasses the
Reserved
11.025
to set the sample rate relative to PCLK. This allows
high flexibility in both the PCLK and LRCLK frequen-
cies and can be used in either master or slave mode.
slave modes, common MCLK frequencies (12MHz,
13MHz, 16MHz, and 19.2MHz) can be programmed
to operate in exact integer mode for both 8kHz and
16kHz sample rates. In these modes, the MCLK and
LRCLK rates are selected by using the FREQ1 bits
instead of the NI, and PLL control bits.
PLL for reduce power consumptions and uses fixed
counters to generate the clocks. The DAI__DAC_LP
bits override the overclock settings.
22.05
(kHz)
44.1
16
24
32
8
Stereo Audio Codec
DESCRIPTION
VALUE
0xA
0xB
0xC
0xD
0x8
0x9
0xE
0xF
SAMPLE RATE
Reserved
Reserved
Reserved
Reserved
Reserved
(kHz)
88.2
48
96
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