wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 133

• Manufacturer Part Number: wm8918
• Description: Ultra Low Power Dac For Portable Audio Applications
• Manufacturer: Wolfson Microelectronics plc

Production Data
Register 06h Mic Bias Control 0
R7 (07h) Mic
Register 07h Mic Bias Control 1
Register 0Ah Analogue DMIC 0
Register 0Ch Power Management 0
Register 0Eh Power Management 2
w
Bias Control
Managemen
Managemen
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
ADDRESS
ADDRESS
ADDRESS
ADDRESS
ADDRESS
R10 (0Ah)
R12 (0Ch)
R14 (0Eh)
Analogue
DMIC 0
Power
Power
t 0
t 2
1
BIT
BIT
BIT
BIT
BIT
2:0
1
0
0
1
0
1
0
MICBIAS_SEL[
DMIC_OSR128
MICBIAS_ENA
HPR_PGA_EN
HPL_PGA_EN
MICDET_ENA
INR_ENA
INL_ENA
LABEL
LABEL
LABEL
LABEL
LABEL
2:0]
A
A
DEFAULT
DEFAULT
DEFAULT
DEFAULT
DEFAULT
000
0
0
1
0
0
0
0
MICBIAS Current and Short Circuit Detect Enable
0 = disabled
1 = enabled
MICBIAS Enable
0 = disabled
1 = enabled
Selects MICBIAS voltage (AVDD=1.8V)
000 = 1.6V
001 = 2.0V
010 = 2.1V
011 = 2.4V
100 to 111 = 2.7V
Values scale with AVDD.
DMIC Oversampling Ratio
0 = Normal (64 x fs)
1 = Reserved
This bit must be set to 0 for digital microphone
operation.
Left Input PGA Enable
0 = disabled
1 = enabled
Right Input PGA Enable
0 = disabled
1 = enabled
Left Headphone Output Enable
0 = disabled
1 = enabled
Right Headphone Output Enable
0 = disabled
1 = enabled
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
PD, Rev 4.0, September 2010
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WM8918
133