WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 252

• Manufacturer Part Number: WM8351CGEB/RV
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8351
Register 4Ah Mic Bias Control
w
REGISTER
ADDRESS
R74 (4Ah)
Mic Bias
Control
BIT
4:2
1:0
15
14
7
MCDSCTHR[1:0]
MIC_DET_ENA
MCDTHR[2:0]
MICB_ENA
MICB_SEL
LABEL
DEFAULT
000
00
0
0
0
Microphone bias enable
0 = OFF (high impedance output)
1 = ON
Microphone bias voltage control:
0 = 0.9 * AVDD
1 = 0.75 * AVDD
Enable MIC detect:
0 = Disabled
1 = Enabled
Threshold for bias current detection
000 = 160µA
001 = 330µA
010 = 500µA
011 = 680µA
100 = 850µA
101 = 1000µA
110 = 1200µA
111 = 1400µA
These threshold currents scale proportionally with
AVDD. The values given are for AVDD=3.3V.
Threshold for microphone short-circuit detection
00 = 400µA
01 = 900µA
10 = 1350µA
11 = 1800µA
These threshold currents scale proportionally with
AVDD. The values given are for AVDD=3.3V.
DESCRIPTION
PD, April 2012, Rev 4.5
REFER TO
Production Data
252