WM9713LGEFLSLASHV datasheet(23/108 Pages) WOLFSON

23 / 108 page

Pre-Production

WM9713L

PP Rev 3.0 June 2006

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 8 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 9 Right Justified Audio Interface (assuming n-bit word length)

In I

2S mode, the MSB is available on the second 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 between the LSB of one

sample and the MSB of the next.

LEFT CHANNEL

RIGHT CHANNEL

PCMFS

PCMCLK

PCMADC/

PCMDAC

1/fs

n-2 n-1

LSB

MSB

n-2 n-1

LSB

MSB

1 BCLK

Figure 10 I

2S Justified Audio Interface (assuming n-bit word length)

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