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WM8731 датащи(PDF) 19 Page - Wolfson Microelectronics plc

номер детали WM8731
подробное описание детали  Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates
PDF  56 Pages
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производитель  WOLFSON [Wolfson Microelectronics plc]
домашняя страница  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8731 датащи(HTML) 19 Page - Wolfson Microelectronics plc

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WM8731
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 2.0 February 2001
19
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
4:0
LINVOL[4:0]
10111
( 0dB )
Left Channel Line Input Volume
Control
11111 = +12dB . . 1.5dB steps down
to 00000 = -34.5dB
7
LINMUTE
1
Left Channel Line Input Mute to ADC
1 = Enable Mute
0 = Disable Mute
0000000
Left Line In
8
LRINBOTH
0
Left to Right Channel Line Input
Volume and Mute Data Load Control
1 = Enable Simultaneous Load of
LINVOL[4:0] and LINMUTE to
RINVOL[4:0] and RINMUTE
0 = Disable Simultaneous Load
4:0
RINVOL[4:0]
10111
( 0dB )
Right Channel Line Input Volume
Control
11111 = +12dB . .1.5dB steps down
to 00000 = -34.5dB
7
RINMUTE
1
Right Channel Line Input Mute to
ADC
1 = Enable Mute
0 = Disable Mute
0000001
Right Line In
8
RLINBOTH
0
Right to Left Channel Line Input
Volume and Mute Data Load Control
1 = Enable Simultaneous Load of
RINVOL[4:0] and RINMUTE to
LINVOL[4:0] and LINMUTE
0 = Disable Simultaneous Load
Table 2 Line Input Software Control
The line inputs are biased internally through the operational amplifier to VMID. Whenever the line
inputs are muted or the device placed into standby mode, the line inputs are kept biased to VMID
using special anti-thump circuitry. This reduces any audible clicks that may otherwise be heard when
re-activating the inputs.
The external components required to complete the line input application is shown in the Figure 10.
AGND
AGND
R1
R2
C1
C2
AGND
LINEIN
Figure 10 Line Input Application Drawing



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