WM8785

Production Data

w

PD Rev 4.1 December 2006

18

In DSP/PCM mode, the left channel MSB is available on either the 1

rising 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.

In device master mode, the LRC output will resemble the frame pulse shown in Figure 21 and Figure

22. In device slave mode, Figure 23 and Figure 24, it is possible to use any length of frame pulse

less than 1/fs, providing the falling edge of the frame pulse occurs greater than one BCLK period

before the rising edge of the next frame pulse.

Figure 21 DSP/PCM Mode Audio Interface (mode A, LRP=0, Master)

Figure 22 DSP/PCM Mode Audio Interface (mode B, LRP=1, Master)