Owners manual

Interfaces

Audio_PLL

24.576Mhz or 22.5792Mhz generated by AUDIO-PLL to produce 48KHz or 44.1KHz serial frequency

8.6.3. Functionalities Description

8.6.3.1. Typical Applications

The I2S/PCM provides a serial bus interface for stereo and multichannel audio data. This interface is most commonly

used by consumer audio market, including compact disc, digital audio tape, digital sound processors, and digital

TV-sound.

8.6.3.2. Functional Block Diagram

The I2S/PCM Interface block diagram is shown below:

64x32-bits

RX FIFO

I2S

Engine

PCM

Engine

PCM

Codec

Clock

Divide

MCLK

BCLK

LRCK

SDO[3:0]

SDI

TX_DRQ

RX_DRQ

PLL2

DA_INT

APB

128x32-

bits

TX FIFO

Figure 8-8. I2S/PCM Interface System Block Diagram

8.6.4. Timing Diagram

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