參數(shù)資料
型號(hào)： AKD4353VF
英文描述： Consumer IC
中文描述： 消費(fèi)性IC
文件頁(yè)數(shù)： 14/33頁(yè)
文件大?。?/td> 251K
代理商： AKD4353VF
ASAHI KASEI
[AK4353]
MS0016-E-02
2001/05
- 14 -
OPERATION OVERVIEW
n
System Clock Input
The external clocks which are required to operate the AK4353 are MCKI, LRCK and BICK. The master clock (MCKI)
should be synchronized with sampling clock (LRCK) but the phase is not critical. MCKI is used to operate the digital
interpolation filter and the delta-sigma modulator. The frequency of MCKI can be set by CKS2-0, and can be selected to
half, normal or double speed mode by DFS1-0 (See Table 1).
All external clocks (MCKI,BICK,LRCK) should always be present whenever the AK4353 is in the normal operation
mode (PDN = “H”). If these clock are not provided, the AK4353 may draw excess current and may not possibly operate
properly because the device utilizes dynamic refreshed logic internally. If the external clocks are not present, the AK4353
should be in the power-down mode (PDN = “L”) or in the reset mode (RSTN = “0”). After exiting reset at power-up etc.,
the AK4353 is in the power-down mode until MCKI and LRCK are input.
When the register data of CKS2-0 or DFS1-0 is changed during normal operation, the AK4353 should be reset by PDN
pin “L” or RSTN bit “0”.
DFS1-0
“00”
(Normal speed)
256fs
256fs
384fs
384fs
512fs
512fs
768fs
768fs
CKS2
CKS1
CKS0
“11”
(Half speed)
512fs
256fs
768fs
384fs
1024fs
512fs
1536fs
768fs
“01”
(Double speed)
128fs
256fs
192fs
384fs
256fs
N/A
384fs
N/A
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
default (DFS1-0 = “00”)
Table 1. System Clock (DFS1-0=”10”: reserved)
fs [kHz]
16
32
64
22.05
44.1
88.2
24
48
96
Mode
Half
Normal
Double
Half
Normal
Double
Half
Normal
Double
128fs
-
-
8.1920
-
-
11.2896
-
-
12.2880
192fs
-
-
12.2880
-
-
16.9344
-
-
18.4320
Table 2. Example of System Clock [MHz]
256fs
4.0960
8.1920
16.3840
5.6448
11.2896
22.5792
6.1440
12.2880
24.5760
384fs
6.1440
12.2880
24.5760
8.4672
16.9344
33.8688
9.2160
18.4320
36.8640
512fs
8.1920
16.3840
-
11.2896
22.5792
-
12.2880
24.5760
-
768fs
12.2880
24.5760
-
16.9344
33.8688
-
18.4320
36.8640
-
1024fs
16.3840
-
-
22.5792
-
-
24.5760
-
-
1536fs
24.5760
-
-
33.8688
-
-
36.8640
-
-
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