WM8805
Production Data
DSP MODE A
In DSP Mode A, the MSB of the left channel data is sampled by the WM8805 on the second rising
edge of BCLK following an LRCLK rising edge. The right channel data follows the left channel data
(Figure 21).
The MSB of the left channel of the output data changes on the first falling edge of BCLK following a
low to high LRCLK transition and may be sampled on the rising edge of BCLK. The right channel
data is contiguous with the left channel data (Figure 21).
1 BCLK
1 BCLK
1/fs
LRCLK
BCLK
NO VALID DATA
LEFT
RIGHT
DIN / DOUT
1
2
n
1
2
n
n-1
n-1
MSB
LSB
Input Word Length (IWL)
Figure 21 DSP Mode A
DSP MODE B
In DSP Mode B, the MSB of the left channel data is sampled by the WM8805 on the first BCLK rising
edge following a LRCLK rising edge. The right channel data follows the left channel data (Figure 22).
The MSB of the output data changes on the same falling edge of BCLK as the low to high LRCLK
transition and may be sampled on the rising edge of BCLK. The right channel data is contiguous with
the left channel data (Figure 22).
1/fs
LRCLK
BCLK
NO VALID DATA
LEFT
RIGHT
DIN / DOUT
1
2
n
1
2
n
n-1
1
n-1
MSB
LSB
Input Word Length (IWL)
Figure 22 DSP Mode B
PD Rev 4.1 September 07
48
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
