wm8976gefl-v Wolfson Microelectronics plc, wm8976gefl-v Datasheet - Page 25

• Manufacturer Part Number: wm8976gefl-v
• Description: Stereo Codec With Speaker Driver
• Manufacturer: Wolfson Microelectronics plc

Production Data
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Figure 13 Volume Update Using Zero Cross Detection
Figure 14 Volume Update after Timeout
AUXILIARY INPUTS
If there is a long period where no zero-crossing occurs, a timeout circuit in the WM8980 will
automatically update the volume. The volume updates will occur between one and two timeout
periods, depending on when the INPPGAUPDATE bit is set as shown in Figure 14.
There are two auxiliary inputs, AUXL and AUXR which can be used for a variety of purposes such as
stereo line inputs or as a ‘beep’ input signal to be mixed with the outputs.
The AUXL input can be used as a line input to the input BOOST stage which has gain adjust of -
12dB to +6dB in 3dB steps (plus off). See the INPUT BOOST section for further details.
PD Rev 4.4 July 2009
WM8976
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