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WM8734 데이터시트(PDF) 30 Page - Wolfson Microelectronics plc

부품명 WM8734
상세설명  Stereo Audio CODEC
PDF  46 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8734 데이터시트(HTML) 30 Page - Wolfson Microelectronics plc

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WM8734
Production Data
w
PD Rev 4.1 November 2006
30
The exact sample rates achieved are defined by the relationships in Table 11 below.
ACTUAL SAMPLING RATE
BOSR=0
BOSR=1
TARGET
SAMPLING
RATE
MCLK=12.288
MCLK=11.2896
MCLK=18.432
MCLK=16.9344
kHz
kHz
kHz
kHz
kHz
8
8.018
8
8.018
8
(12.288MHz/256) x 1/6
(11.2896MHz/256) x 2/11
(18.432MHz/384) x 1/6
(16.9344MHz/384) x 2/11
32
32
32
(12.288MHz/256) x 2/3
not available
(18.432MHz/384)x 2/3
not available
44.1
44.1
44.1
not available
11.2896MHz/256
not available
16.9344MHz /384
48
48
48
12.288MHz/256
not available
18.432MHz/384
not available
88.2
88.2
88.2
not available
(11.2896MHz/384) x 2
not available
(16.9344MHz /384) x 2
96
96
96
(12.288MHz/256) x 2
not available
(18.432MHz/384) x 2
not available
Table 11 Normal Mode Actual Sample Rates
128/192fs NORMAL MODE
The Normal Mode sample rates are designed for standard 256fs and 384fs MCLK rates. However the
WM8734 is also capable of being clocked from a 128 or 192fs MCLK for application over limited
sampling rates as shown in the table below.
SAMPLING
RATE
ADC
DAC
MCLK
FREQUENCY
SAMPLE
RATE
REGISTER SETTINGS
DIGITAL
FILTER
TYPE
kHz
kHz
MHz
BOSR
SR3
SR2
SR1
SR0
6.144
0
0
1
1
1
48
48
9.216
1
0
1
1
1
2
5.6448
0
1
1
1
1
44.1
44.1
8.4672
1
1
1
1
1
2
Table 12 128fs Normal Mode Sample Rate Look-up Table
512/768fs NORMAL MODE
512 fs and 768 fs MCLK rates can be accommodated by using the CLKIDIV2 bit. The core clock to
the DSP will be divided by 2 so an external 512/768 MCLK will become 256/384 fs internally and the
device otherwise operates as in Table 8 but with MCLK at twice the specified rate. See Table 6 for
software control.



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