adau1381 Analog Devices, Inc., adau1381 Datasheet - Page 52

• Manufacturer Part Number: adau1381
• Description: Low-noise Stereo Codec With Enhanced Recording And Playback Processing
• Manufacturer: Analog Devices, Inc.

ADAU1381
Register 16400 (0x4010), Microphone Bias Control and
Beep Enable
Bit 4, Beep Input Enable
This bit enables the beep signal, which is input to the BEEP pin.
Setting this bit to 0 mutes the beep signal for all output paths.
Bit 3, Microphone High Performance
This bit puts the microphone bias into high performance mode,
by offering more current to the microphone.
Table 39. Microphone Bias Control and Beep Enable Register
Bits
[7:5]
4
3
2
1
0
Description
Reserved
Beep input enable
0: disabled
1: enabled
Microphone high performance
0: high power
1: low performance
Microphone gain
0: enabled
1: disabled
Reserved
Microphone bias enable
0: disabled
1: enabled
Rev. A | Page 52 of 84
Bit 2, Microphone Gain
Provides two voltage bias options, 0.65 × AVDD1 and 0.90 ×
AVDD1. A higher bias contributes to a higher microphone gain.
The maximum current that can be drawn from MICBIAS is 5 mA.
Bit 0, Microphone Bias Enable
This bit enables the MICBIAS output.
Default
0
0
0
0