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參數(shù)資料
| 型號： | AK4113VF |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | 192KHZ 24BIT DIR WITH 6:1 SELECTOR |
| 中文描述： | 192kHz 24位處長與6:1選擇器 |
| 文件頁數(shù)： | 16/49頁 |
| 文件大?。?/td> | 531K |
| 代理商： | AK4113VF |
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ASAHI KASEI
[AK4113]
MS0349-E-01
2005/03
- 16 -
Clock Operation Mode
The CM0 and CM1 pins (or bits) select the clock source and the data source of SDTO. In Mode 2, the clock source is
switched from PLL to X'tal when PLL goes unlock state. In Mode3, the clock source is fixed to X'tal, but PLL is also
operating and the recovered data such as C bits can be monitored. For Mode2 and 3, it is recommended that the
frequency of X’tal is different from the recovered frequency from PLL.
Mode
CM1
CM0
UNLOCK
PLL
0
0
0
-
ON
1
0
1
-
OFF
0
ON
2
1
0
1
ON
3
1
1
-
ON
ON: Oscillation (Power-up), OFF: STOP (Power-Down)
Note: When the X’tal is not used as clock comparison for fs detection (i.e. XTL1-0 bit = “11”), the X’tal is OFF.
Table 1. Clock Operation Mode Select
Master Clock
The AK4113 has two clock outputs, MCKO1 and MCKO2. MCKO2 has two modes. These modes can be selected by the
XMCK bit.
1) When XMCK bit = “0” and BCU bit = “0”
This mode is compatibile AK4112B and AK4114. These clocks are derived from either the recovered clock or the X'tal
oscillator. The frequencies of the master clock outputs (MCKO1 and MCKO2) are set by OCKS0 and OCKS1 as shown
in Table 2. The 512fs clock will not operate when the sampling frequency is 96kHz or 192kHz. The 256fs clock will not
operate when the sampling frequency is 192kHz.
No.
OCKS1
OCKS0
MCKO1 pin
MCKO2 pin
0
0
0
256fs
256fs
1
0
1
256fs
128fs
2
1
0
512fs
256fs
3
1
1
128fs
64fs
Table 2. Master Clock Output Frequency
2) When XMCK bit “1” and BCU bit = “0”
MCKO2 outputs the input clock of the XTI pin when BCU bit = “0” and XMCK bit = “1”. The settings of CM1-0 and
OCKS1-0 bits are ignored. The output frequency can be set by the DIV bit. MCKO1 outputs a clock that is selected by
the CM1-0 bits and OCKS1-0 bits.
XMCK bit
DIV bit
MCKO2 Clock Source
1
0
X’tal
1
1
X’tal
Table 3. Select output frequency of MCKO2
X'tal
Clock source
PLL
X'tal
PLL
X'tal
X'tal
SDTO
RX
DAUX
RX
DAUX
DAUX
ON (Note)
ON
ON
ON
ON
Default
X’tal
256fs
256fs
512fs
128fs
fs (max)
108 kHz
108 kHz
54 kHz
216 kHz
Default
MCKO2 Frequency
x 1
x 1/2
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