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WM8591GEDS/RV Folha de dados(PDF) 14 Page - Wolfson Microelectronics plc

Nome de Peças WM8591GEDS/RV
Descrição Electrónicos  24 BIT, 192 KHZ STEREO CODEC
PDF  50 Pages
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Fabricante Electrônico  WOLFSON [Wolfson Microelectronics plc]
Página de início  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8591GEDS/RV Folha de dados(HTML) 14 Page - Wolfson Microelectronics plc

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WM8591
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PP Rev 1.0 May 2005
14
Table 5 shows the typical system clock frequencies for ADC operation at both 128 times
oversampling rate (ADCOSR=0) and 64 times oversampling rate (ADCOSR=1), and DAC operation
at 128 times oversampling rate (DACOSR=0). Table 6 shows typical system clock frequencies for
DAC operation at 64 times oversampling rate (DACOSR =1).
System Clock Frequency (MHz)
SAMPLING
RATE
(ADCLRC/
DACLRC)
256fs
384fs
512fs
768fs
1152fs
(DAC only)
32kHz
8.192
12.288
16.384
24.576
36.864
44.1kHz
11.2896
16.9340
22.5792
33.8688
Unavailable
48kHz
12.288
18.432
24.576
36.864
Unavailable
96kHz
24.576
36.864
Unavailable
Unavailable
Unavailable
Table 5 ADC and DAC System Clock Frequencies Versus Sampling Rate
(ADC operation at either 128 times oversampling rate (ADCOSR=0) or 64 times oversampling
rate (ADCOSR=1), DAC operation at 128 times oversampling rate, DACOSR=0)
System Clock Frequency (MHz)
SAMPLING
RATE
(DACLRC)
128fs
192fs
96kHz
12.288
18.432
192kHz
24.576
36.864
Table 6 DAC System Clock Frequencies Versus Sampling Rate at 64 Times
Oversampling Rate (DACOSR=1)
In Master mode DACBCLK, ADCBCLK, DACLRC and ADCLRC are generated by the WM8591. The
frequencies of ADCLRC and DACLRC are set by setting the required ratio of DACMCLK to DACLRC
and ADCMCLK to ADCLRC using the DACRATE and ADCRATE control bits (Table 7).
ADCRATE[2:0]/
DACRATE[2:0]
ADCMCLK/DACMCLK:
ADCLRC/DACLRC
RATIO
000
128fs (DAC Only)
001
192fs (DAC Only)
010
256fs
011
384fs
100
512fs
101
768fs
Table 7 Master Mode MCLK: ADCLRC/DACLRC Ratio Select
Table 8 shows the settings for ADCRATE and DACRATE for common sample rates and
ADCMCLK/DACMCLK frequencies.
System Clock Frequency (MHz)
128fs
192fs
256fs
384fs
512fs
768fs
SAMPLING
RATE
(DACLRC/
ADCLRC)
DACRATE
=000
DACRATE
=001
ADCRATE/
DACRATE
=010
ADCRATE/
DACRATE
=011
ADCRATE/
DACRATE
=100
ADCRATE/
DACRATE
=101
32kHz
4.096
6.144
8.192
12.288
16.384
24.576
44.1kHz
5.6448
8.467
11.2896
16.9340
22.5792
33.8688
48kHz
6.144
9.216
12.288
18.432
24.576
36.864
96kHz
12.288
18.432
24.576
36.864
Unavailable
Unavailable
192kHz
24.576
36.864
Unavailable
Unavailable
Unavailable
Unavailable
Table 8 Master Mode ADC/DACLRC Frequency Selection



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