WM9714L_06 WOLFSON [Wolfson Microelectronics plc], WM9714L_06 Datasheet - Page 22
WM9714L_06
Manufacturer Part Number
WM9714L_06
Description
AC 97 Audio CODEC
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
1.WM9714L_06.pdf
(94 pages)
- Current page: 22 of 94
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WM9714L
w
In Left Justified mode, the MSB is available on the first rising edge of PCMCLK following a PCMFS
transition. The other bits up to the LSB are then transmitted in order. Depending on word length,
PCMCLK frequency and sample rate, there may be unused PCMCLK cycles before each PCMFS
transition.
Figure 8 Left Justified Audio Interface (assuming n-bit word length)
In Right Justified mode, the LSB is available on the last rising edge of PCMCLK before a PCMFS
transition. All other bits are transmitted before (MSB first). Depending on word length, PCMCLK
frequency and sample rate, there may be unused PCMCLK cycles after each PCMFS transition.
Figure 9 Right Justified Audio Interface (assuming n-bit word length)
In I
transition. The other bits up to the LSB are then transmitted in order. Depending on word length,
PCMCLK frequency and sample rate, there may be unused PCMCLK cycles between the LSB of one
sample and the MSB of the next.
Figure 10 I
PCMADC /
PCMADC/
PCMADC/
PCMCLK
PCMDAC
PCMCLK
PCMDAC
PCMCLK
PCMDAC
PCMFS
PCMFS
PCMFS
2
S mode, the MSB is available on the second rising edge of PCMCLK following a PCMFS
2
S Justified Audio Interface (assuming n-bit word length)
MSB
1
MSB
2
1 BCLK
1
3
2
MSB
1
3
LEFT CHANNEL
LEFT CHANNEL
LEFT CHANNEL
2
3
n-2 n-1
n-2 n-1
n
LSB
n-2 n-1
n
LSB
LSB
n
MSB
1/fs
1/fs
1/fs
1
MSB
1 BCLK
1
2
3
2
MSB
1
3
RIGHT CHANNEL
RIGHT CHANNEL
RIGHT CHANNEL
2
3
n-2 n-1
n-2 n-1
PP Rev 3.0 June 2006
n
LSB
n-2 n-1
n
LSB
Pre-Production
LSB
n
22
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