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WM8351 датащи(PDF) 68 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) 68 Page - Wolfson Microelectronics plc

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WM8351
Production Data
w
PD, April 2012, Rev 4.5
68
13.4.6
AUXILIARY INPUTS (IN3L AND IN3R)
The WM8351 provides two additional analogue input pins, IN3L and IN3R, for line-level audio or
“beep” signals. Each pin has a simple input buffer whose output signal can be digitised in the audio
ADC and/or mixed into the output signal path. The Right input IN3R may also be connected to the
Output Beep Mixer, for output on OUT2R (see Table 43). The input buffers have a nominal default
gain of -1 (0dB).
Figure 38 Auxiliary Input Buffers
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R9 (09h)
Power
Mgmt 2
10
IN3L_ENA
0
IN3L Amplifier enable
0 = disabled
1 = enabled
11
IN3R_ENA
0
IN3R Amplifier enable
0 = disabled
1 = enabled
R73 (49h)
IN3 Input
Control
7
IN3L_ENA
0
IN3L Amplifier enable
0 = disabled
1 = enabled
15
IN3R_ENA
0
IN3R Amplifier enable
0 = disabled
1 = enabled
6
IN3L_SHORT
0
Short circuit internal input resistor for
IN3L amplifier.
0 = Internal resistor in circuit
1 = Internal resistor shorted
14
IN3R_SHORT
0
Short circuit internal input resistor for
IN3R amplifier.
0 = Internal resistor in circuit
1 = Internal resistor shorted
Note: IN3L_ENA and IN3R_ENA can be accessed through R9 or through R73. Reading from or
writing to either register location has the same effect.
Table 24 Controlling the Auxiliary Input Buffers



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