WM8777
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DIGITAL AUDIO INTERFACE ROUTING OPTIONS
The WM8777 has extremely flexible digital audio interface routing options which are illustrated in
Figure 4. It has an S/PDIF receiver, S/PDIF transmitter and two digital audio interfaces. Each DAC
has its own digital input pin PDATAIP1/2/3/4. Internal multiplexors in the primary audio interface
(DAC) allow the data received on any DIN pin to be routed to any DAC .Any DIN pin routed to DAC1
is also routed to the S/PDIF and Secondary Audio Interface transmitters. DAC1 may also be used to
convert received S/PDIF data to analogue, while DACs 2-4 take data only from the primary audio
interface. The primary audio interface can output ADC data, received S/PDIF data or data from the
secondary audio interface on the PDATAOP pin.
The secondary audio interface can output ADC data, received S/PDIF data and data received
through PDATAIP1-4 on the SDATAOP pin. The S/PDIF transmitter can output S/PDIF received
data, and converts ADC data and data from both audio interfaces into S/PDIF format and outputs
them on SPDIFOP.
Figure 4 WM8777 Digital Routing Diagram
PP Rev 1.94 November 2004
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
