AK4480 데이터 시트보기 (PDF) - Asahi Kasei Microdevices
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AK4480 Datasheet PDF : 44 Pages
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[AK4480]
(2) Serial Mode (P/S pin = “L”)
1. Manual Setting Mode (ACKS bit = “0”)
MCLK frequency is detected automatically and the sampling speed is set by DFS1-0 bits (Table 8). The MCLK frequency
corresponding to each sampling speed should be provided (Table 9). The AK4480 is set to Manual Setting Mode at
power-up (PDN pin = “L” → “H”). When DFS1-0 bits are changed, the AK4480 should be reset by RSTN bit.
DFS1 bit DFS0 bit
Sampling Rate (fs)
0
0
Normal Speed Mode 30kHz ∼ 54kHz (default)
0
1
Double Speed Mode 54kHz ∼ 108kHz
1
0
Quad Speed Mode 120kHz ∼ 216kHz
Table 8. Sampling Speed (Manual Setting Mode @Serial Mode)
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
MCLK (MHz)
128fs
192fs
256fs
384fs
512fs
768fs
1152fs
N/A
N/A
8.1920 12.2880 16.3840 24.5760 36.8640
N/A
N/A
11.2896 16.9344 22.5792 33.8688
N/A
N/A
N/A
12.2880 18.4320 24.5760 36.8640
N/A
11.2896 16.9344 22.5792 33.8688
N/A
N/A
N/A
12.2880 18.4320 24.5760 36.8640
N/A
N/A
N/A
22.5792 33.8688
N/A
N/A
N/A
N/A
N/A
24.5760 36.8640
N/A
N/A
N/A
N/A
N/A
Table 9. System Clock Example (Manual Setting Mode @Serial Mode)
BICK
64fs
2.0480MHz
2.8224MHz
3.0720MHz
5.6448MHz
6.1440MHz
11.2896MHz
12.2880MHz
2. Auto Setting Mode (ACKS bit = “1”)
MCLK frequency and the sampling speed are detected automatically (Table 10) and DFS1-0 bits are ignored. The MCLK
frequency corresponding to each sampling speed should be provided (Table 11).
MCLK
Sampling Speed
1152fs
Normal (fs≤32kHz)
512fs/256fs 768fs/384fs
Normal
256fs
384fs
Double
128fs
192fs
Quad
Table 10. Sampling Speed (Auto Setting Mode @Serial Mode)
LRCK
fs
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
176.4kHz
192.0kHz
MCLK (MHz)
128fs
192fs
256fs
384fs
512fs
768fs
1152fs
N/A
N/A
8.1920 12.2880 16.3840 24.5760 36.8640
N/A
N/A
11.2896 16.9344 22.5792 33.8688
N/A
N/A
N/A
12.2880 18.4320 24.5760 36.8640
N/A
N/A
N/A
22.5792 33.8688
N/A
N/A
N/A
N/A
N/A
24.5760 36.8640
N/A
N/A
N/A
22.5792 33.8688
N/A
N/A
N/A
N/A
N/A
24.5760 36.8640
N/A
N/A
N/A
N/A
N/A
Table 11. System Clock Example (Auto Setting Mode @Serial Mode)
Sampling
Speed
Normal
Double
Quad
MS1146-E-03
- 19 -
2012/01
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