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WM8980CGEFL/V Datasheet(PDF) 26 Page - Wolfson Microelectronics plc

Part # WM8980CGEFL/V
Description  Stereo CODEC with Speaker Driver and Video Buffer
PDF  123 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8980CGEFL/V Datasheet(HTML) 26 Page - Wolfson Microelectronics plc

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WM8980
Pre-Production
w
PP, Rev 3.8, May 2012
26
VOLUME UPDATES
Volume settings will not be applied to the PGAs until a ‘1’ is written to one of the INPPGAUPDATE
bits. This is to allow left and right channels to be updated at the same time, as shown in Figure 10.
Figure 10 Simultaneous Left and Right Volume Updates
If the volume is adjusted while the signal is a non-zero value, an audible click can occur as shown in
Figure 11.
Figure 11 Click Noise During Volume Update
In order to prevent this click noise, a zero cross function is provided. When enabled, this will cause
the PGA volume to update only when a zero crossing occurs, minimising click noise as shown in
Figure 12.



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