WM8948 Datasheet, PDF (53/189 Pages) Wolfson Microelectronics plc – Stereo Low-Power CODEC with Video Buffer and Touch Panel Controller

Production Data
WM8948
OUTPUT SIGNAL PATH
The WM8948 provides two Line Output mixers 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) or mono 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 20.
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 20 Output Signal Paths
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PD, May 2011, Rev 4.1
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