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WM9713 Arkusz danych(PDF) 24 Page - Wolfson Microelectronics plc

Numer części WM9713
Szczegółowy opis  AC 97 AUDIO TOUCHPANEL CODEC
PDF  111 Pages
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Producent  WOLFSON [Wolfson Microelectronics plc]
Strona internetowa  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM9713 Arkusz danych(HTML) 24 Page - Wolfson Microelectronics plc

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WM9713L
Preliminary Technical Data
1
PTD, March 2004, Rev 2.2
24
The PCM Interface may be configured for Mono mode, where only one channel of ADC data is
output. In this mode the interface should be configured for DSP mode. A short or long frame sync is
supported and the MSB is available on either the 1st (mode B) or 2nd (mode A) rising edge of
VXCLK.
Note that when operating in stereo mode the mono Voice DAC always uses the left channel data as
its input.
PCMFS
PCMCLK
PCMADC/
PCMDAC
n
3
2
1
n-2 n-1
LSB
MSB
1 PCMCLK
Input Word Length (WL)
1/fs
Figure 5 PCM Interface Mono Mode (mode A, FSP=0)
PCMFS
PCMCLK
PCMADC/
PCMDAC
n
3
2
1
n-2 n-1
LSB
MSB
1 PCMCLK
Input Word Length (WL)
1/fs
Figure 6 PCM Interface Mono Mode (mode B, FSP=1)
In DSP mode, the left channel MSB is available on either the 1st (mode B) or 2nd (mode A) rising
edge of PCMCLK (selectable by FSP) following a rising edge of PCMFS. Right channel data
immediately follows left channel data. Depending on word length, PCMCLK frequency and sample
rate, there may be unused PCMCLK cycles between the LSB of the right channel data and the next
sample.



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