WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 68
WM8351CGEB/RV
Manufacturer Part Number
WM8351CGEB/RV
Description
Manufacturer
WOLFSON [Wolfson Microelectronics plc]
Datasheet
1.WM8351CGEBRV.pdf
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WM8351
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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
Table 24 Controlling the Auxiliary Input Buffers
13.4.6
R9 (09h)
Power
Mgmt 2
R73 (49h)
IN3 Input
Control
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.
REGISTER
ADDRESS
AUXILIARY INPUTS (IN3L AND IN3R)
BIT
10
11
15
14
7
6
IN3L_ENA
IN3R_ENA
IN3L_ENA
IN3R_ENA
IN3L_SHORT
IN3R_SHORT
LABEL
DEFAULT
0
0
0
0
0
0
IN3L Amplifier enable
0 = disabled
1 = enabled
IN3R Amplifier enable
0 = disabled
1 = enabled
IN3L Amplifier enable
0 = disabled
1 = enabled
IN3R Amplifier enable
0 = disabled
1 = enabled
Short circuit internal input resistor for
IN3L amplifier.
0 = Internal resistor in circuit
1 = Internal resistor shorted
Short circuit internal input resistor for
IN3R amplifier.
0 = Internal resistor in circuit
1 = Internal resistor shorted
DESCRIPTION
PD, April 2012, Rev 4.5
Production Data
68
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