WM8731L WOLFSON [Wolfson Microelectronics plc], WM8731L Datasheet - Page 36

• Manufacturer Part Number: WM8731L
• Description: Portable Internet Audio CODEC with Headphone Driver and Programmable Sample Rates
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8731 / WM8731L
Figure 27 I
Figure 28 Right Justified Mode
Figure 29 DSP/PCM Mode Audio Interface (mode A, LRP=1)
w
DACLRC/
ADCLRC
DACLRC/
DACDAT/
ADCLRC
ADCDAT
DACDAT/
ADCDAT
BCLK
BCLK
2
S Mode
MSB
1 BCLK
1
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.
In DSP/PCM mode, the left channel MSB is available on either the 1
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.
2
MSB
3
1
LEFT CHANNEL
LEFT CHANNEL
2
3
n-2 n-1
n-2 n-1
n
LSB
n
LSB
1/fs
1/fs
MSB
1 BCLK
1
2
MSB
3
1
RIGHT CHANNEL
RIGHT CHANNEL
2
3
st
(mode B) or 2
n-2 n-1
PD Rev 4.3 August 2006
n
n-2 n-1
LSB
nd
Production Data
(mode A) rising
n
LSB
36