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WM8731SEDS/R データシート(PDF) 36 Page - Wolfson Microelectronics plc

部品番号 WM8731SEDS/R
部品情報  Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
PDF  63 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731SEDS/R データシート(HTML) 36 Page - Wolfson Microelectronics plc

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WM8731 / WM8731L
Production Data
w
PD Rev 4.3 August 2006
36
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 27 I
2S Mode
Right Justified mode is where the LSB is available on the rising edge of BCLK preceding a DACLRC
or ADCLRC 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 28 Right Justified Mode
In DSP/PCM mode, the left channel MSB is available on either the 1
st (mode B) or 2nd (mode A) rising
edge of BCLK (selectable by LRP) following a rising edge of LRC. Right channel data immediately
follows left channel data. Depending on word length, BCLK frequency and sample rate, there may be
unused BCLK cycles between the LSB of the right channel data and the next sample.
Figure 29 DSP/PCM Mode Audio Interface (mode A, LRP=1)



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