WM8945
Production Data
OUTPUT SIGNAL PATH
The WM8945 provides a Line Output mixer and two Speaker Output mixers. Multiple inputs to each
mixer provide a high degree of flexibility to route different signal paths to each of the four analogue
outputs.
The DAC outputs can be routed to the mixers either directly or in inverted phase. This makes it easy
to generate differential (BTL) output signals.
The Auxiliary inputs AUX1/2 may be routed directly to the Speaker outputs, bypassing the Speaker
PGAs and mixers. This can be used to provide a fixed-gain signal path for a “PC Beep” or similar
application.
The output signal paths and associated control registers are illustrated in Figure 19.
Note that the speaker outputs are intended to drive a mono headset or speaker (in BTL
configuration). They are not designed to drive stereo speakers directly.
Figure 19 Output Signal Paths
PD, May 2011, Rev 4.1
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
