WM8524
Production Data
DEVICE DESCRIPTION
INTRODUCTION
The WM8524 provides high fidelity, 2Vrms ground referenced stereo line output from a single supply
line with minimal external components. The integrated DC servo eliminates the requirement for
external mute circuitry by minimising DC transients at the output during power up/down. The device
is well-suited to both stereo and multi-channel systems.
The device supports all common audio sampling rates between 8kHz and 192kHz using common
MCLK fs rates, with a slave mode audio interface.
The WM8524 supports a simple hardware control mode, allowing access to 24-bit LJ, RJ and I2S
audio interface formats, as well as a mute control. An internal audio interface clock monitor
automatically mutes the DAC output if the BCLK is interrupted.
DIGITAL AUDIO INTERFACE
The digital audio interface is used for inputting audio data to the WM8524. The digital audio interface
uses three pins:
DACDAT: DAC data input
LRCLK: Left/Right data alignment clock
BCLK: Bit clock, for synchronisation
The WM8524 digital audio interface operates as a slave as shown in Figure 5.
Figure 5 Slave Mode
INTERFACE FORMATS
The WM8524 supports three different audio data formats:
Left justified
Right justified
I2S
All three of these modes are MSB first. They are described in Audio Data Formats on page 13. Refer
to the “Electrical Characteristics” section for timing information.
PD, Rev 4.1, October 2011
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
