WM8900LGEFK/RV Wolfson Microelectronics, WM8900LGEFK/RV Datasheet - Page 37

• Manufacturer Part Number: WM8900LGEFK/RV
• Description: Audio CODECs Ultra Low Power Hi-Fi CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8900LGEFK/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Production Data
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Table 15 Microphone Input PGA Boost Control
The boost stage can apply -12dB to +6dB gain to the line inputs. The line inputs may also be
muted via the boost gain settings, as shown in Table 16.
Table 16 Line Input Boost Control
Note that, when all input paths to the boost mixer are disabled, the boost mixer will automatically
be muted.
R26 (1Ah)
ADC Signal
Path
R24 (18h)
Input Boost
Mixer 1
R25 (19h)
Input Boost
Mixer 2
R27 (1Bh)
Aux Boost
REGISTER
REGISTER
ADDRESS
ADDRESS
6:4
2:0
5:4
1:0
6:4
2:0
6:4
2:0
BIT
BIT
INL_MIXINL_BOOST
[1:0]
INR_MIXINR_BOOST
[1:0]
IN3L_BOOST [2:0]
IN2L_BOOST [2:0]
IN3R_BOOST [2:0]
IN2R_BOOST [2:0]
IN4L_BOOST [2:0]
IN4R_BOOST [2:0]
LABEL
LABEL
DEFAULT
DEFAULT
100
100
100
100
100
100
00
00
LINPUT3 to Boost Gain
LINPUT2 to Boost Gain
RINPUT3 to Boost Gain
RINPUT2 to Boost Gain
Left Channel PGA Boost Gain
00 = +0dB
01 = +13dB
10 = +20dB
11 = +29dB
Right Channel PGA Boost Gain
00 = +0dB
01 = +13dB
10 = +20dB
11 = +29dB
000 = -12dB
...6dB steps up to
011 = +6dB
1XX = Mute
000 = -12dB
...6dB steps up to
011 = +6dB
1XX = Mute
000 = -12dB
...6dB steps up to
011 = +6dB
1XX = Mute
000 = -12dB
...6dB steps up to
011 = +6dB
1XX = Mute
AUX input to Boost Gain
000 = -12dB
...6dB steps up to
011 = +6dB
1XX = Mute
AUX input to Boost Gain
000 = -12dB
...6dB steps up to
011 = +6dB
1XX = Mute
PD, August 2008, Rev 4.0
DESCRIPTION
DESCRIPTION
WM8900
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