參數(shù)資料
型號: AK4650VG
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
中文描述: 16位ツヒ編解碼器麥克風/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 20/86頁
文件大?。?/td> 824K
代理商: AK4650VG
[AK4650]
MS0502-E-01
2007/04
- 20 -
OPERATION OVERVIEW
Master Clock Source
The AK4650 requires a master clock (MCLK). This master clock is input to the AK4650 by the following three methods:
(1)
Connect a X’tal oscillator between XTI and XTO pins.
(2)
Input an external CMOS-level clock to the XTI pin.
(3)
Input an external clock whose amplitude is greater than 50%DVDD to the XTI pin with AC coupling.
When using a X’tal oscillator, there should be capacitors between XTI/XTO pins and DVSS (Figure 12).
Master Clock
X’tal Oscillator
(Figure 12)
(PLL1 pin = “L”)
Oscillator OFF
External Clock Direct Input
(Figure 13)
Clock is input to MCKI pin.
(PLL1 pin = “L”)
MCKI pin is fixed to “L”.
MCKI pin is fixed to “H”.
MCKI pin is Hi-Z
External Clock Direct Input
(Figure 14)
Clock is input to MCKI pin.
(PLL1 pin = “H”)
MCKI pin is fixed to “L”.
MCKI pin is fixed to “H”.
MCKI pin is Hi-Z
AC Coupling Input
(Figure 15)
Clock is input to MCKI pin.
(PLL1 pin = “L”)
Clock isn’t input to MCKI pin.
Table 1. Master Clock Status by PR5 bit and MCKPD bit
(1)
X’tal Oscillator (PLL1 pin = “L”)
Status
PR5 bit
0
1
0
1
1
1
0
0
0
0
0
1
MCKPD bit
0
1
0
0/1
0
1
0
0/1
0
1
0
1
Oscillator ON
XTI
XTO
AK4650
25k
Ω
(typ)
MCKPD = "0"
PR5 = "0"
C
C
PLL1 = "L"
PLL1 = "L"
Figure 12. X’tal mode
Note 34. The capacitor values depend on the X’tal oscillator used. (C : typ. 10
30pF)
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