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WM8960 データシート(PDF) 27 Page - Wolfson Microelectronics plc

部品番号 WM8960
部品情報  Stereo CODEC with 1W Stereo Class D Speaker Drivers and Headphone Drivers for Portable Audio Applications
PDF  92 Pages
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メーカー  WOLFSON [Wolfson Microelectronics plc]
ホームページ  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8960 データシート(HTML) 27 Page - Wolfson Microelectronics plc

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Production Data
WM8960
w
PD, August 2013, Rev 4.2
27
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R21 (15h)
Left ADC
Digital Volume
7:0
LADCVOL
[7:0]
11000011
( 0dB )
Left ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -97dB
0000 0010 = -96.5dB
... 0.5dB steps up to
1111 1111 = +30dB
8
ADCVU
0
ADC Volume Update
0 = Store LADCVOL in intermediate
latch (no gain change)
1 = Update left and right channel
gains (left = LADCVOL, right =
intermediate latch)
R22 (16h)
Right ADC
Digital Volume
7:0
RADCVOL
[7:0]
11000011
( 0dB )
Right ADC Digital Volume Control
0000 0000 = Digital Mute
0000 0001 = -97dB
0000 0010 = -96.5dB
... 0.5dB steps up to
1111 1111 = +30dB
8
ADCVU
0
ADC Volume Update
0 = Store RADCVOL in intermediate
latch (no gain change)
1 = Update left and right channel
gains (left = intermediate latch, right
= RADCVOL)
Table 10 ADC Digital Volume Control
ADC DIGITAL FILTERS
The ADC filters perform true 24-bit signal processing to convert the raw multi-bit oversampled data
from the ADC to the correct sampling frequency to be output on the digital audio interface.
HIGH PASS FILTER
A digital high pass filter is applied by default to the ADC path to remove DC offsets. This filter can be
disabled using the ADCHPD register bit.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R5 (05h)
ADC and DAC
Control (1)
0
ADCHPD
0
ADC High Pass Filter Disable
0 = Enable high pass filter on left and
right channels
1 = Disable high pass filter on left and
right channels
Table 11 ADC High Pass Filter
The high pass filter characteristics are shown in the Digital Filter Characteristics section.



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