參數(shù)資料
型號(hào): AK4556
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 3V 192kHz 24Bit ツヒ CODEC
中文描述: 3V的192kHz 24位ツヒ編解碼器
文件頁數(shù): 14/22頁
文件大小: 189K
代理商: AK4556
ASAHI KASEI
[AK4556]
MS0559-E-00
2006/11
- 14 -
OPERATION OVERVIEW
System Clock
MCLK, BCLK and LRCK (fs) clocks are required in slave mode. The LRCK clock input must be synchronized with
MCLK, however the phase is not critical. Table 1 shows the relationship of typical sampling frequency and the system
clock frequency. MCLK frequency, BCLK frequency, HPF (ON or OFF) and master/slave are selected by CKS3-0 pins
as shown in Table 3. When MCLK is 192fs, 384fs or 768fs, the sampling frequency does not support variable pitch (Table
2).
All external clocks (MCLK, BCLK and LRCK) must be present unless the PDN pin = “L”. If these clocks are not
provided, the AK4556 may draw excess current due to its use of internal dynamically refreshed logic. If the external
clocks are not present, place the AK4556 in power-down mode (PDN pin = “L”). In master mode, the master clock
(MCLK) must be provided unless the PDN pin = “L”.
MCLK
fs
128fs
N/A
N/A
N/A
N/A
192fs
N/A
N/A
N/A
N/A
256fs
8.192MHz
11.2896MHz
12.288MHz
24.576MHz
N/A
384fs
512fs
768fs
32kHz
44.1kHz
48kHz
96kHz
192kHz
12.288MHz
16.9344MHz
18.432MHz
36.864MHz
N/A
16.384MHz
22.5792MHz
24.576MHz
N/A
N/A
24.576MHz
33.8688MHz
36.864MHz
N/A
N/A
24.576MHz
36.864MHz
Table 1. System Clock Example (N/A: Not Available)
Mode
Sampling Frequency
8kHz
fs
54kHz
8kHz
fs
48kkHz
54kHz < fs
108kHz
48kHz < fs
96kHz
108kHz < fs
216kHz
96kHz < fs
192kHz
Table 2. Sampling Frequency Range
MCLK
256fs/512fs
384fs/768fs
256fs
384fs
128fs
192fs
Normal Speed
Double Speed
Quad Speed
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