WM8994ECSSLASHR datasheet(170/363 Pages) CIRRUS

170 / 363 page

WM8994

170

Rev 4.6

n-1

n-2

n-1

n-2

LEFT CHANNEL

RIGHT CHANNEL

MSB

LSB

Input Word Length (WL)

1/fs

LRCLK

BCLK

DACDAT/

ADCDAT

Figure 54 DSP Mode Audio Interface (mode B, AIF_LRCLK_INV=1, Master)

n-1

n-2

n-1

n-2

LEFT CHANNEL

RIGHT CHANNEL

MSB

LSB

Input Word Length (WL)

1/fs

LRCLK

BCLK

DACDAT/

ADCDAT

1 BCLK

Falling edge can occur anywhere in this area

1 BCLK

Figure 55 DSP Mode Audio Interface (mode A, AIF_LRCLK_INV=0, Slave)

n-1

n-2

n-1

n-2

LEFT CHANNEL

RIGHT CHANNEL

MSB

LSB

Input Word Length (WL)

1/fs

LRCLK

BCLK

DACDAT/

ADCDAT

1 BCLK

Falling edge can occur anywhere in this area

Figure 56 DSP Mode Audio Interface (mode B, AIF_LRCLK_INV=1, Slave)

Mono mode operation is available in DSP interface mode. When Mono mode is enabled, the audio

data is transmitted or received starting on either the 1st (mode B) or 2nd (mode A) rising edge of BCLK

following a rising edge of LRCLK.

PCM operation is supported in DSP interface mode. WM8994 ADC data that is output on the Left

Channel will be read as mono PCM data by the receiving equipment. Mono PCM data received by the

WM8994 will be treated as Left Channel data. This data may be routed to the Left/Right DACs using

the control fields described in the

“Digital Mixing” and “Digital Audio Interface Control” sections.

WM8994ECS/R Datasheet(PDF) 170 Page - Cirrus Logic

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