WM8804 datasheet(47/66 Pages) WOLFSON

47 / 66 page

Production Data

WM8804

PD Rev 4.1 September 2007

DSP MODE A

In DSP Mode A, the MSB of the left channel data is sampled by the WM8804 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).

LRCLK

BCLK

DIN / DOUT

Input Word Length (IWL)

1/fs

LEFT

n-1

LSB

MSB

n-1

RIGHT

NO VALID DATA

1 BCLK

Figure 21 DSP Mode A

DSP MODE B

In DSP Mode B, the MSB of the left channel data is sampled by the WM8804 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).

LRCLK

BCLK

DIN / DOUT

Input Word Length (IWL)

1/fs

LEFT

n-1

LSB

MSB

n-1

RIGHT

NO VALID DATA

Figure 22 DSP Mode B

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