WM8918 Datasheet, PDF (133/176 Pages) Cirrus Logic – Ultra Low Power DAC for Portable Audio Applications

Production Data
REGISTER BIT
LABEL
DEFAULT
DESCRIPTION
ADDRESS
1 MICDET_ENA
0
MICBIAS Current and Short Circuit Detect Enable
0 = disabled
1 = enabled
0 MICBIAS_ENA
0
MICBIAS Enable
0 = disabled
1 = enabled
Register 06h Mic Bias Control 0
WM8918
REFER TO
REGISTER BIT
LABEL
DEFAULT
DESCRIPTION
ADDRESS
R7 (07h) Mic 2:0 MICBIAS_SEL[
000
Selects MICBIAS voltage (AVDD=1.8V)
Bias Control
2:0]
1
000 = 1.6V
001 = 2.0V
010 = 2.1V
011 = 2.4V
100 to 111 = 2.7V
Values scale with AVDD.
Register 07h Mic Bias Control 1
REFER TO
REGISTER
ADDRESS
R10 (0Ah)
Analogue
DMIC 0
BIT
LABEL
DEFAULT
DESCRIPTION
0 DMIC_OSR128
1
DMIC Oversampling Ratio
0 = Normal (64 x fs)
1 = Reserved
This bit must be set to 0 for digital microphone
operation.
Register 0Ah Analogue DMIC 0
REFER TO
REGISTER BIT
ADDRESS
R12 (0Ch)
1
Power
Managemen
t0
0
LABEL
INL_ENA
INR_ENA
Register 0Ch Power Management 0
DEFAULT
DESCRIPTION
0
Left Input PGA Enable
0 = disabled
1 = enabled
0
Right Input PGA Enable
0 = disabled
1 = enabled
REFER TO
REGISTER BIT
LABEL
DEFAULT
DESCRIPTION
ADDRESS
R14 (0Eh)
1 HPL_PGA_EN
0
Left Headphone Output Enable
Power
A
0 = disabled
Managemen
t2
0 HPR_PGA_EN
0
1 = enabled
Right Headphone Output Enable
A
0 = disabled
1 = enabled
Register 0Eh Power Management 2
w
REFER TO
PD, Rev 4.1, January 2012
133