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WM8731 датащи(PDF) 33 Page - Wolfson Microelectronics plc

номер детали WM8731
подробное описание детали  Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates
PDF  56 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731 датащи(HTML) 33 Page - Wolfson Microelectronics plc

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WM8731
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 February 2001
33
LEFT CHANNEL
RIGHT CHANNEL
DACLRC/
ADCLRC
BCLK
DACDAT/
ADCDAT
1/fs
n
3
2
1
n-2
n-1
LSB
MSB
n
3
2
1
n-2
n-1
LSB
MSB
1 BCLK
1 BCLK
Figure 26 I2S Mode
Right Justified mode is where the LSB is available on the rising edge of BCLK preceding a LRCLK
transition, yet MSB is still transmitted first.
LEFT CHANNEL
RIGHT CHANNEL
DACLRC/
ADCLRC
BCLK
DACDAT/
ADCDAT
1/fs
n
3
2
1
n-2 n-1
LSB
MSB
n
3
2
1
n-2 n-1
LSB
MSB
Figure 27 Right Justified Mode
DSP mode is where the left channel MSB is available on either the 1
st or 2nd rising edge of BCLK
(selectable by LRP) following a LRC transition high.
Right channel data immediately follows left
channel data.
LEFT CHANNEL
RIGHT CHANNEL
DACLRC/
ADCLRC
BCLK
DACDAT/
ADCDAT
n
3
2
1
n-2 n-1
LSB
MSB
n
3
2
1
n-2 n-1
1 BCLK
Input Word Length (IWL)
Note: Input word length is defined by the IWL register, LRP = 1
1/fs
Figure 28 DSP Mode



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