參數(shù)資料
型號(hào): AK4537VN
廠商: Asahi Kasei Microsystems Co.,Ltd
元件分類: Codec
英文描述: 16-Bit ツヒ Stereo CODEC with MIC/HP/SPK-AMP
中文描述: 16位ツヒ立體聲編解碼器與麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁數(shù): 19/76頁
文件大小: 576K
代理商: AK4537VN
ASAHI KASEI
[AK4537]
MS0202-E-04
2005/04
- 19 -
OPERATION OVERVIEW
Master Clock Source
The AK4537 requires a master clock (MCLK). This master clock is input to the AK4537 by connecting a X’tal oscillator
to XTI and XTO pins or by inputting an external CMOS-level clock to the XTI pin or by inputting an external clock that
is greater than 50% of the DVDD level to the XTI pin through a capacitor.
When using a X’tal oscillator, there should be capacitors between XTI/XTO pins and DVSS. When using an external
clock, there are two choices: direct, where an external clock is input directly to the XTI pin and indirect, where the
external clock is input through a capacitor.
Master Clock
X’tal Oscillator
(Figure 13)
Oscillator OFF
External Clock Direct Input
(Figure 14)
Clock is input to MCKI pin.
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.
Clock isn’t input to MCKI pin.
Table 1. Master Clock Status by PMXTL bit and MCKPD bit
(1) X’tal Oscillator
Status
PMXTL bit
1
0
0
0
0
0
1
0
MCKPD bit
0
1
0
0/1
0
1
0
1
Oscillator ON
XTI
XTO
AK4537
25k
MCKPD = "0"
PMXTL = "1"
C
C
Figure 13. X’tal mode
Note: The capacitor values depend on the X’tal oscillator used. (C : typ. 10
30pF)
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