ak4683 AKM Semiconductor, Inc., ak4683 Datasheet - Page 29

• Manufacturer Part Number: ak4683
• Description: Asynchronous Multi-channel Audio Codec With Dir/t
• Manufacturer: AKM Semiconductor, Inc.

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There are two modes for controlling the sampling speed for ADC and DAC. One is the Manual Setting Mode using the
DFSAD1-0, DFSDA1-0 bits, and the other is Auto Setting Mode. When the block connects to both PORTA and
PORTB, the PORTA setting is used.
1. Manual Setting Mode (ACSKAD / ACSKDA bit = “0”: Default)
When the ADC and DAC are connected to each PORT placed in Manual Setting Mode, the sampling speed are selected
by DFSAD, DFSDA1-0 bits (Table 21, Table 22). The frequencies and the duties of the clocks (ILRCKA, OLRCKA,
LRCKB, BICKA, BICKB) may be unstable for the moment when changing the sampling speed mode.
MS0427-E-02
ADC, DAC Control
(Note: ADC is not available for 128fs and 192fs at Double Speed Mode (DFSAD=“1”))
(LRCKB)
(LRCKB)
DFSDA1
LRCKA
88.2kHz
96.0kHz
LRCKA
32.0kHz
44.1kHz
48.0kHz
fs
fs
0
0
1
1
DFSAD0
0
1
DFSDA0
0
1
0
1
11.2896
12.2880
11.2896
12.2880
(Normal Speed Mode @Manual Setting Mode)
(Double Speed Mode @Manual Setting Mode)
128fs
256fs
8.1920
Normal Speed Mode
Double Speed Mode
Table 21.ADC sampling speed (Manual Setting Mode)
Table 22.DAC sampling speed (Manual Setting Mode)
Table 23. System clock example
Table 24. System clock example
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
MCLK (MHz)
MCLK (MHz)
Not Available
Sampling Speed (fs)
16.9344
18.4320
12.2880
16.9344
18.4320
192fs
384fs
Sampling Speed (fs)
- 29 -
32kHz~48kHz
64kHz~96kHz
22.5792
24.5760
16.3840
22.5792
24.5760
256fs
512fs
120kHz~192kHz
32kHz~48kHz
64kHz~96kHz
-
BICKA (BICKB)
BICKA (BICKB)
(default)
2.0480
(MHz)
5.6448
6.1440
(MHz)
2.8224
3.0720
64fs
64fs
(default)
[AK4683]
2007/04