wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 65
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wm8351
Manufacturer Part Number
wm8351
Description
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8351.pdf
(328 pages)
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Production Data
w
13.4.2
R9 (09h)
Power Mgmt
2
R80 (50h)
Left Input
Volume
R81 (51h)
Right Input
Volume
Note: These bits can be accessed through R9 or through R80/R81. Reading from or writing to either
register location has the same effect.
Table 20 Enabling the Microphone Pre-amplifiers
13.4.3
R72 (48h)
Mic Input
Control
Table 21 Selecting Input Pins for the Microphone Pre-amplifiers
ADDRESS
ADDRESS
ENABLING THE PRE-AMPLIFIERS
SELECTING INPUT SIGNALS
BIT
10
0
1
2
8
9
BIT
15
15
8
9
IN1LP_ENA
IN1LN_ENA
IN2L_ENA
IN1RP_ENA
IN1RN_ENA
IN2R_ENA
INL_ENA
INR_ENA
INL_ENA
INR_ENA
LABEL
LABEL
DEFAULT
DEFAULT
1
1
0
1
1
0
0
0
0
0
Connect IN1LP pin to left channel input PGA
amplifier positive terminal.
0 = IN1LP not connected to input PGA
1 = input PGA amplifier positive terminal
connected to IN1LP (constant input
impedance)
Connect IN1LN pin to left channel input PGA
negative terminal.
0 = IN1LN not connected to input PGA
1 = IN1LN connected to input PGA amplifier
negative terminal.
Connect IN2L pin to left channel input PGA
amplifier
0 = IN2L not connected to input PGA amplifier
1 = IN2L connected to input PGA amplifier
Connect IN1RP pin to right channel input PGA
amplifier positive terminal.
0 = IN1RP not connected to input PGA
1 = right channel input PGA amplifier positive
terminal connected to IN1RP (constant input
impedance)
Connect IN1RN pin to right channel input PGA
negative terminal.
0 = IN1RN not connected to input PGA
1 = IN1RN connected to right channel input
PGA amplifier negative terminal.
Connect IN2R pin to right channel input PGA
0 = IN2R not connected to input PGA amplifier
1 = IN2R connected to input PGA amplifier
Left input PGA enable
0 = disabled
1 = enabled
Right input PGA enable
0 = disabled
1 = enabled
Left input PGA enable
0 = disabled
1 = enabled
Right input PGA enable
0 = disabled
1 = enabled
DESCRIPTION
DESCRIPTION
PD, June 2009, Rev 4.1
WM8351
65
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