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WM8993 Datasheet(PDF) 38 Page - Wolfson Microelectronics plc

Part # WM8993
Description  Audio Hub CODEC for Multimedia Phones
PDF  229 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8993 Datasheet(HTML) 38 Page - Wolfson Microelectronics plc

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WM8993
Production Data
w
PD, November 2010, Rev 4.0
38
Figure 10 IN1LN or IN1RN as Line Inputs
Figure 11 IN2LN or IN2RN as Line Inputs
Figure 12 IN1LP or IN1RP as Line Inputs
Figure 13 IN2LP or IN2RP as Line Inputs
INPUT PGA ENABLE
The Input PGAs are enabled using register bits IN1L_ENA, IN2L_ENA, IN1R_ENA and IN2R_ENA,
as described in Table 2. The Input PGAs must be enabled for microphone input on the respective
input pins, or for line input on the inverting input pins IN1LN, IN1RN, IN2LN, IN2RN.
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R2 (02h)
Power
Management
(2)
7
IN2L_ENA
0b
IN2L Input PGA Enable
0 = Disabled
1 = Enabled
6
IN1L_ENA
0b
IN1L Input PGA Enable
0 = Disabled
1 = Enabled
5
IN2R_ENA
0b
IN2R Input PGA Enable
0 = Disabled
1 = Enabled
4
IN1R_ENA
0b
IN1R Input PGA Enable
0 = Disabled
1 = Enabled
Table 2 Input PGA Enable
For normal operation of the input PGAs, the reference voltage VMID and the bias current must also
be enabled. See “Reference Voltages and Master Bias” for details of the associated controls
VMID_SEL and BIAS_ENA.



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