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WM8281ECS/R Datenblatt(PDF) 310 Page - Cirrus Logic

Teilenummer WM8281ECS/R
Bauteilbeschribung  Low Power Audio System with Ambient Noise Cancellation and Echo Cancellation
PDF  392 Pages
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Hersteller  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8281ECS/R Datenblatt(HTML) 310 Page - Cirrus Logic

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WM8281
310
Rev 4.0
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
1
MICB1_BYPASS
1
Microphone Bias 1 Mode
0 = Regulator mode
1 = Bypass mode
0
MICB1_ENA
0
Microphone Bias 1 Enable
0 = Disabled
1 = Enabled
R537
(219h)
Mic Bias
Ctrl 2
15
MICB2_EXT_CA
P
0
Microphone Bias 2 External Capacitor
(when MICB2_BYPASS = 0).
Configures the MICBIAS2 regulator
according to the specified capacitance
connected to the MICBIAS2 output.
0 = No external capacitor
1 = External capacitor connected
8:5
MICB2_LVL [3:0]
7h
Microphone Bias 2 Voltage Control
(when MICB2_BYPASS = 0)
0h = 1.5V
1h = 1.6V
… (0.1V steps)
Ch = 2.7V
Dh to Fh = 2.8V
3
MICB2_RATE
0
Microphone Bias 2 Rate (Bypass mode)
0 = Fast start-up / shut-down
1 = Pop-free start-up / shut-down
2
MICB2_DISCH
1
Microphone Bias 2 Discharge
0 = MICBIAS2 floating when disabled
1 = MICBIAS2 discharged when disabled
1
MICB2_BYPASS
1
Microphone Bias 2 Mode
0 = Regulator mode
1 = Bypass mode
0
MICB2_ENA
0
Microphone Bias 2 Enable
0 = Disabled
1 = Enabled
R538
(21Ah)
Mic Bias
Ctrl 3
15
MICB3_EXT_CA
P
0
Microphone Bias 3 External Capacitor
(when MICB3_BYPASS = 0).
Configures the MICBIAS3 regulator
according to the specified capacitance
connected to the MICBIAS3 output.
0 = No external capacitor
1 = External capacitor connected
8:5
MICB3_LVL [3:0]
7h
Microphone Bias 3 Voltage Control
(when MICB3_BYPASS = 0)
0h = 1.5V
1h = 1.6V
… (0.1V steps)
Ch = 2.7V
Dh to Fh = 2.8V
3
MICB3_RATE
0
Microphone Bias 3 Rate (Bypass mode)
0 = Fast start-up / shut-down
1 = Pop-free start-up / shut-down
2
MICB3_DISCH
1
Microphone Bias 3 Discharge
0 = MICBIAS3 floating when disabled
1 = MICBIAS3 discharged when disabled
1
MICB3_BYPASS
1
Microphone Bias 3 Mode
0 = Regulator mode
1 = Bypass mode



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