ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 412 -
Revision 2.4
LDO Power Down Register (ANA_LDOPD)
Register
Offset
R/W
Description
Reset Value
ANA_LDOPD
0x24
R/W
LDO Power Down Register
0x0000_0001
7
6
5
4
3
2
1
0
Reserved
DISCHAR
PD
Table 7-8
LDO Power Down Control
Register (ANA_LDOPD, address 0x4008_0024).
Bits
Description
[31:2]
Reserved
Reserved.
[1]
DISCHAR
Discharge
0 = Don’t discharge VD33.
1 = Switch discharge resistor to VD33.
[0]
PD
Power Down LDO
When powered down no current delivered to VD33.
0= Enable LDO.
1= Power Down.
7.4.6
Microphone Bias (Replaced by Bridge Sense ADC)
Microphone Bias Enable Register (ANA_MICBEN)
Register
Offset
R/W
Description
Reset Value
ANA_MICBEN
0x2C
R/W
Microphone Bias Enable
0x0000_0001
7
6
5
4
3
2
1
0
Reserved
PD
Table 7-9
Microphone Bias Enable Control
Register (ANA_MICBEN, address 0x4008_002C).
Bits
Description
[31:1]
Reserved
Reserved.
[0]
PD
Power Down Microphone Bias
0= Enable Microphone Bias
1= Power Down Microphone Bias
Note: MICBIAS output needs VMID enable together.
Microphone Bias Voltage Level Selection Register (ANA_MICBSEL)
Register
Offset
R/W
Description
Reset Value
ANA_MICBSEL
0x28
R/W
Microphone Bias Voltage Level Selection
0x0000_0000