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WM8985GEFL/R bảng dữ liệu(PDF) 32 Page - Wolfson Microelectronics plc

tên linh kiện WM8985GEFL/R
Giải thích chi tiết về linh kiện  Multimedia CODEC With Class D Headphone and Line Out
PDF  118 Pages
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nhà sản xuất  WOLFSON [Wolfson Microelectronics plc]
Trang chủ  http://www.wolfsonmicro.com
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WM8985GEFL/R bảng dữ liệu(HTML) 32 Page - Wolfson Microelectronics plc

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WM8985
Pre-Production
w
PP, Rev 3.5, March 2007
32
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 13.
Figure 13 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 14.
Figure 14 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 15.



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