WM8523 datasheet(21/51 Pages) WOLFSON

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Production Data

WM8523

PD, Rev 4.1, August 2011

DIGITAL AUDIO INTERFACE

The digital audio interface is used for inputting audio data to the WM8523. The digital audio interface

uses three pins:

•

DACDAT: DAC data input

•

LRCLK: Left/Right data alignment clock

•

BCLK: Bit clock, for synchronisation

In software control mode, all interface data formats and modes of operation can be selected. In

hardware control mode, only a subset of formats and modes are supported – see the Hardware Interface

Control section on page 32 for details.

MASTER AND SLAVE MODE OPERATION

The WM8523 digital audio interface can operate as a master or as a slave as shown in Figure 14 and

Figure 15.

Figure 14 Slave Mode

Figure 15 Master Mode

INTERFACE FORMATS

The WM8523 supports five different audio data formats:

•

Left justified

•

Right justified

•

I2S

•

DSP Mode A

•

DSP Mode B

PCM operation is supported using the DSP mode. All seven of these modes are MSB first. They are

described in Audio Data Formats on page 22. Refer to the “Electrical Characteristics” section for timing

information. Refer to Table 10 for interface control format register settings.

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