参数资料
型号: LC890561W
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP48
封装: 7 X 7 MM, SQFP-48
文件页数: 2/47页
文件大小: 357K
代理商: LC890561W
LC890561W
No8226-10/47
7. System Reset (XMODE)
The system operates normally when XMODE pin is set to high level after 3.0V or higher supply voltage is applied.
After power-on, the system is reset by setting XMODE to low again.
Make sure to reset the system after turning on the power.
Figure 7.1 Reset Timing Chart
8. PLL (LPF)
It has a build-in VCO (Voltage Controlled Oscillator) and synchronizes with sampling frequencies of 32kHz,
44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz and 192kHz.
The lock judgment of PLL is performed by detection of preamble B, M and W.
The lock frequency of PLL is selected by CKSEL0 and CKSEL1. However, only 256fs is selectable on the system
which input sampling frequency is over 96kHz. The proper PLL function to input over 96kHz will not be ensured
when other frequency value is selected.
LPF is pin for loop filter of PLL and connects resistor and capacitor as shown below.
R0
C0
C1
220
0.1
F
0.068
F
Figure 8.1 Configuration of a Loop filter
LPF
R0
C0
C1
XMODE
DVDD
Reset state
System operation
3.0V
t
t > 200
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