WM8580
Production Data
DIGITAL AUDIO INTERFACES
Audio data is transferred to and from the WM8580 via the digital audio interfaces. There are two
receive audio interfaces and two transmit audio interfaces. The digital routing options for these
interfaces are described on page 22. Control of the audio interfaces is described below.
MASTER AND SLAVE MODES
The audio interfaces require both a left-right-clock (LRCLK) and a bit-clock (BCLK). These can be
supplied externally (slave mode) or they can be generated internally (master mode). When in master
mode, the BCLKs and LRCLKs for an interface are output on the corresponding BCLK and LRCLK
pins. By default, all interfaces operate in slave mode, but can operate in master mode by setting the
PAIFTXMS, PAIFRXMS and SAIFMS register bits. In Hardware Control Mode, the PAIF Transmitter
can operate in master mode by setting the SDI pin.
Figure 12 Slave Mode
Figure 13 Master Mode
PD Rev 4.3 August 2007
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
