WM9714L_06 WOLFSON [Wolfson Microelectronics plc], WM9714L_06 Datasheet - Page 21

• Manufacturer Part Number: WM9714L_06
• Description: AC 97 Audio CODEC
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

Pre-Production
w
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.
Figure 7 DSP Mode Audio Interface (mode A, FSP=0)
Figure 7 DSP Mode Audio Interface (mode B, FSP=1)
PCMADC/
PCMADC/
PCMCLK
PCMDAC
PCMCLK
PCMDAC
PCMFS
PCMFS
PCMADC/
PCMDAC
PCMCLK
PCMFS
MSB
1
1 BCLK / VXCLK
1 BCLK / VXCLK
MSB
1
2
MSB
2
3
1
Input Word Length (WL)
LEFT CHANNEL
3
1 PCMCLK
Input Word Length (WL)
LEFT CHANNEL
2
3
Input Word Length (WL)
n-2 n-1
n-2 n-1
LSB
n
LSB
n
1
1
2
n-2 n-1
2
3
RIGHT CHANNEL
3
1/fs
RIGHT CHANNEL
1/fs
LSB
n
n-2 n-1
n-2 n-1
n
n
1/fs
PP Rev 3.0 June 2006
WM9714L
21