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WM8351 датащи(PDF) 76 Page - Wolfson Microelectronics plc

номер детали WM8351
подробное описание детали  Wolfson AudioPlus??Stereo CODEC with Power Management
PDF  330 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8351 датащи(HTML) 76 Page - Wolfson Microelectronics plc

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WM8351
Production Data
w
PD, April 2012, Rev 4.5
76
The volume ramp rate during soft mute and un-mute is controlled by the DAC_MUTERATE bit. Ramp
rates of fs/32 and fs/2 are selectable as shown
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R58 (3Ah)
DAC Mute
14
DAC_MUTE
1
DAC Mute
0 = disabled
1 = enabled
R59 (3Bh)
DAC Mute
Volume
14
DAC_MUTEM
ODE
0
DAC Soft Mute Mode
0 = Disabling soft-mute
(DAC_MUTE=0) will cause the volume
to change immediately to the
DACL_VOL / DACR_VOL settings
1 = Disabling soft-mute
(DAC_MUTE=0) will cause the volume
to ramp up gradually to the DACL_VOL
/ DACR_VOL settings
13
DAC_MUTER
ATE
0
DAC Soft Mute Ramp Rate
0 = Fast ramp (24kHz at fs=48k,
providing maximum delay of 10.7ms)
1 = Slow ramp (1.5kHz at fs=48k,
providing maximum delay of 171ms)
Table 33 DAC Soft-Mute Control
13.7.3
DAC DE-EMPHASIS
Digital de-emphasis can be applied to the DAC playback data (e.g. when the data comes from a CD
with pre-emphasis used in the recording). De-emphasis filtering is available for sample rates of
48kHz, 44.1kHz and 32kHz.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R48 (30h)
DAC Control
5:4
DEEMP [1:0]
00
De-Emphasis Control
11 = 48kHz sample rate
10 = 44.1kHz sample rate
01 = 32kHz sample rate
00 = No de-emphasis
Table 34 DAC De-Emphasis Control



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