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WM8960GEFL/V Datasheet(PDF) 19 Page - Wolfson Microelectronics plc

Part # WM8960GEFL/V
Description  Stereo CODEC with 1W Stereo Class D Speaker Drivers and Headphone Drivers for Portable Audio Applications
PDF  88 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8960GEFL/V Datasheet(HTML) 19 Page - Wolfson Microelectronics plc

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Preliminary Technical Data
WM8960
w
PTD, September 2006, Rev 2.0
19
Figure 8 Microphone Input PGA Circuit
The input PGAs and boost mixers are enabled by the AINL and AINR register bits. The microphone
PGAs can be also be disabled independently of the boost mixer to save power, using LMIC and
RMIC register bits.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
5
AINL
0
Left channel input PGA and boost
stage enable
0 = PGA disabled, boost disabled
1 = PGA enabled (if LMIC = 1),
boost enabled
R25 (19h)
Power
Management
(1)
4
AINR
0
Right channel input PGA and boost
stage enable
0 = PGA disabled, boost disabled
1 = PGA enabled (if LMIC = 1),
boost enabled
5
LMIC
0
Left channel input PGA enable
0 = PGA disabled
1 = PGA enabled (if AINL = 1)
R47 (2Fh)
Power
Management
(3)
4
RMIC
0
Right channel input PGA enable
0 = PGA disabled
1 = PGA enabled (if AINR = 1)
Table 2 Input PGA and Boost Enable Register Settings
The
input
PGAs
can
be
configured
as
differential
inputs,
using
LINPUT1/LINPUT2
or
LINPUT1/LINPUT3, and RINPUT1/RINPUT2 or RINPUT1/RINPUT3. The input impedance to these
non-inverting inputs is constant in this configuration. Differential configuration is controlled by LMP2,
LMP3, RMP2 and RMP3 as shown in Table 3.
When single-ended configuration is selected, the non-inverting input of the PGA is connected to
VMID.



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