Pre-Production

WM8786

w

PP Rev 3.0 December 2005

17

In I

The other bits up to the LSB are then transmitted in order. Depending on word length, BCLK

frequency and sample rate, there may be unused BCLK cycles between the LSB of one sample and

the MSB of the next.

Figure 18 I

In DSP/PCM mode, the left channel MSB is available on the 2

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 19. In device

slave mode, Figure 20 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 19 DSP/PCM Mode Audio Interface (mode A, Master)

Figure 20 DSP/PCM Mode Audio Interface (mode A, Slave)