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WM8591
DSP MODES
In DSP/PCM mode, the left channel MSB is available on either the 1st (mode B) or 2nd (mode A)
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 15 and Figure
16. In device slave mode, Figure 17 and Figure 18, 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 15 DSP/PCM Mode Audio Interface (mode A, LRP=0, Master)
Figure 16 DSP/PCM Mode Audio Interface (mode B, LRP=1, Master)
PP Rev 1.0 May 2005
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
