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WM8948 데이터시트(PDF) 39 Page - Wolfson Microelectronics plc

부품명 WM8948
상세설명  Stereo Low-Power CODEC with Video Buffer and Touch Panel Controller
PDF  189 Pages
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제조업체  WOLFSON [Wolfson Microelectronics plc]
홈페이지  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8948 데이터시트(HTML) 39 Page - Wolfson Microelectronics plc

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Production Data
WM8948
w
PD, May 2011, Rev 4.1
39
Typical applications of the 5-band EQ include the selection of user-preferences for different music
types, such as ‘rock’, ‘dance’ or ‘classical’ EQ profiles.
Note that when the right channel 5BEQ filter is disabled the gains for each of the frequency
bands must be set to 0dB.
DYNAMIC RANGE CONTROL (DRC)
DRC
Signal Enhancement Block 3 (SE3)
The Dynamic Range Control (DRC) forms the SE3 block. The DRC provides a range of compression,
limiting and noise gate functions to support optimum configuration for recording or playback modes.
The DRC is configured using the control fields in registers R29 to R35 - see “Dynamic Range
Control”.
SIGNAL ENHANCEMENT REGISTER CONTROLS
The SE1 ‘enable’ bits are described in Table 13. Note that other control fields must also be
determined and written to the WM8948 using WISCE™ or other tools. The registers described below
only allow the sub-blocks of SE1 to be enabled or disabled.
Note that it is not recommended to access these control fields unless appropriate values have been
written to the associated bits in registers R65 to R98.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R65 (41h)
SE1_LHPF_
CONFIG
1
SE1_LHPF_R_
ENA
0
SE1 Right channel low-pass / high-
pass filter enable
0 = Disabled
1 = Enabled
0
SE1_LHPF_L_
ENA
0
SE1 Left channel low-pass / high-
pass filter enable
0 = Disabled
1 = Enabled
R68 (44h)
SE1_3D_
CONFIG
1
SE1_3D_R_ENA
0
SE1 Right channel 3D stereo
enhancement filter enable
0 = Disabled
1 = Enabled
0
SE1_3D_L_ENA
0
SE1 Left channel 3D stereo
enhancement filter enable
0 = Disabled
1 = Enabled
R71 (47h)
SE1_NOTCH_
CONFIG
1
SE1_NOTCH_R
_ENA
0
SE1 Right channel notch filters
enable
0 = Disabled
1 = Enabled
0
SE1_NOTCH_L
_ENA
0
SE1 Left channel notch filters
enable
0 = Disabled
1 = Enabled
R92 (5Ch)
SE1_DF1_
CONFIG
1
SE1_DF1_R_
ENA
0
SE1 Right channel DF1 filter enable
0 = Disabled
1 = Enabled
0
SE1_DF1_L_
ENA
0
SE1 Left channel DF1 filter enable
0 = Disabled
1 = Enabled
Table 13 Signal Enhancement Block 1 (SE1)



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