wm9713 Wolfson Microelectronics plc, wm9713 Datasheet - Page 29
wm9713
Manufacturer Part Number
wm9713
Description
Ac?97 Audio + Touchpanel Codec
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM9713.pdf
(132 pages)
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Pre-Production
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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.
Figure 7 DSP Mode Audio Interface (mode A, FSP=0)
Figure 15 DSP Mode Audio Interface (mode B, FSP=1)
PCMADC/
PCMADC/
PCMCLK
PCMDAC
PCMCLK
PCMDAC
PCMFS
PCMFS
MSB
1
1 BCLK / VXCLK
1 BCLK / VXCLK
MSB
1
2
2
3
Input Word Length (WL)
LEFT CHANNEL
3
Input Word Length (WL)
LEFT CHANNEL
n-2 n-1
n-2 n-1
LSB
n
LSB
n
1
1
2
2
3
RIGHT CHANNEL
3
1/fs
RIGHT CHANNEL
1/fs
n-2 n-1
n-2 n-1
n
n
PP Rev 3.2 September 2008
WM9713L
29
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