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WM8971LEFL/R 数据表(PDF) 20 Page - Wolfson Microelectronics plc

部件名 WM8971LEFL/R
功能描述  STEREO CODEC FOR PORTABLE AUDIO APPLLICATIONS
PDF  56 Pages
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制造商  WOLFSON [Wolfson Microelectronics plc]
网页  http://www.wolfsonmicro.com
标志 WOLFSON - Wolfson Microelectronics plc

WM8971LEFL/R 数据表(HTML) 20 Page - Wolfson Microelectronics plc

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WM8971L
Advanced Information
w
AI Rev 3.0 March 2004
20
The inputs can also be muted in the analogue domain under software control. The software control
registers are shown in Table 6
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
8
LIVU
0
Left Volume Update
0 = Store LINVOL in intermediate
latch (no gain change)
1 = Update left and right channel
gains (left = LINVOL, right =
intermediate latch)
7
LINMUTE
1
Left Channel Input Analogue Mute
1 = Enable Mute
0 = Disable Mute
Note: LIVU must be set to un-mute.
6
LZCEN
0
Left Channel Zero Cross Detector
1 = Change gain on zero cross only
0 = Change gain immediately
R0 (00h)
Left Channel
PGA
5:0
LINVOL
[5:0]
010111
( 0dB )
Left Channel Input Volume Control
111111 = +30dB
111110 = +29.25dB
. . 0.75dB steps down to
000000 = -17.25dB
8
RIVU
0
Right Volume Update
0 = Store RINVOL in intermediate
latch (no gain change)
1 = Update left and right channel
gains (right = RINVOL, left =
intermediate latch)
7
RINMUTE
1
Right Channel Input Analogue Mute
1 = Enable Mute
0 = Disable Mute
Note: RIVU must be set to un-mute.
6
RZCEN
0
Right Channel Zero Cross Detector
1 = Change gain on zero cross only
0 = Change gain immediately
R1 (01h)
Right Channel
PGA
5:0
RINVOL
[5:0]
010111
( 0dB )
Right Channel Input Volume Control
111111 = +30dB
111110 = +29.25dB
. . 0.75dB steps down to
000000 = -17.25dB
R23 (17h)
Additional
Control (1)
0
TOEN
0
Timeout Enable
0 : Timeout Disabled
1 : Timeout Enabled
Table 6 Input PGA Software Control



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