ak4529 AKM Semiconductor, Inc., ak4529 Datasheet - Page 15

• Manufacturer Part Number: ak4529
• Description: High Performance Multi-channel Audio Codec
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
n System Clock
The external clocks, which are required to operate the AK4529, are MCLK, LRCK and BICK. There are two methods to
set MCLK frequency. In Manual Setting Mode (ACKS = “0”: Default), the sampling speed is set by DFS (Table 1). The
frequency of MCLK at each sampling speed is set automatically. (Table 2, 3). In Auto Setting Mode (ACKS = “1”), as
MCLK frequency is detected automatically (Table 4), and the internal master clock becomes the appropriate frequency
(Table 5), it is not necessary to set DFS.
MCLK should be synchronized with LRCK but the phase is not critical. External clocks (MCLK, BICK) should always be
present whenever the AK4529 is in normal operation mode (PDN = “H”). If these clocks are not provided, the AK4529
may draw excess current because the device utilizes dynamic refreshed logic internally. If the external clocks are not
present, the AK4529 should be in the power-down mode (PDN = “L”) or in the reset mode (RSTN = “0”). After exiting
reset at power-up etc., the AK4529 is in the power-down mode until MCLK and LRCK are input.
MS0082-E-00
(Note: At double speed mode(DFS = “1”), 128fs and 192fs are not available for ADC.)
Table 2. System Clock Example (Normal Speed Mode @Manual Setting Mode)
Table 3. System Clock Example (Double Speed Mode @Manual Setting Mode)
88.2kHz
96.0kHz
32.0kHz
44.1kHz
48.0kHz
LRCK
LRCK
fs
fs
DFS
0
1
Table 1. Sampling Speed (Manual Setting Mode)
Table 4. Sampling Speed (Auto Setting Mode)
11.2896
12.2880
Normal Speed Mode
Double Speed Mode
11.2896
12.2880
128fs
256fs
8.1920
OPERATION OVERVIEW
MCLK
512fs
256fs
Sampling Speed (fs)
MCLK (MHz)
MCLK (MHz)
16.9344
18.4320
12.2880
16.9344
18.4320
192fs
384fs
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Sampling Speed
Normal
Double
32kHz~48kHz
64kHz~96kHz
22.5792
24.5760
16.3840
22.5792
24.5760
256fs
512fs
BICK (MHz)
BICK (MHz)
Default
2.0480
5.6448
6.1440
2.8224
3.0720
64fs
64fs
[AK4529]
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