WM9714CLGEFLSLASHV datasheet(28/120 Pages) CIRRUS

28 / 120 page

WM9714L

Rev 4.0

LEFT CHANNEL

RIGHT CHANNEL

PCMFS

PCMCLK

PCMADC/

PCMDAC

n-2 n-1

LSB

MSB

n-2 n-1

1 BCLK / VXCLK

Input Word Length (WL)

1/fs

Figure 15 DSP Mode Audio Interface (mode B, FSP=1)

In Left Justified mode, the MSB is available on the first rising edge of PCMCLK following a PCMFS

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

PCMCLK frequency and sample rate, there may be unused PCMCLK cycles before each PCMFS

transition.

LEFT CHANNEL

RIGHT CHANNEL

PCMFS

PCMCLK

PCMADC/

PCMDAC

1/fs

n-2 n-1

LSB

MSB

n-2 n-1

LSB

MSB

Figure 16 Left Justified Audio Interface (assuming n-bit word length)

In Right Justified mode, the LSB is available on the last rising edge of PCMCLK before a PCMFS

transition. All other bits are transmitted before (MSB first). Depending on word length, PCMCLK

frequency and sample rate, there may be unused PCMCLK cycles after each PCMFS transition.

LEFT CHANNEL

RIGHT CHANNEL

PCMFS

PCMCLK

PCMADC /

PCMDAC

1/fs

n-2 n-1

LSB

MSB

n-2 n-1

LSB

MSB

Figure 17 Right Justified Audio Interface (assuming n-bit word length)

WM9714CLGEFL/V Datasheet(PDF) 28 Page - Cirrus Logic

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