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WM8983GEFL/V Datasheet(PDF) 33 Page - Wolfson Microelectronics plc

Part # WM8983GEFL/V
Description  Mobile Multimedia CODEC with 1W Speaker Driver
PDF  124 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8983GEFL/V Datasheet(HTML) 33 Page - Wolfson Microelectronics plc

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Production Data
WM8983
w
PD, Rev 4.3, May 2010
33
VOLUME UPDATES
Volume settings will not be applied to the PGAs until a ‘1’ is written to one of the INPPGAVU bits.
This is to allow left and right channels to be updated at the same time, as shown in Figure 16.
Figure 16 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 17.
Figure 17 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 18.



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