adau1961 Analog Devices, Inc., adau1961 Datasheet - Page 50

• Manufacturer Part Number: adau1961
• Description: Stereo, Low Power, 96 Khz, 24-bit Audio Codec With Integrated Pll Adau1961
• Manufacturer: Analog Devices, Inc.

ADAU1961
R9: Right Differential Input Volume Control, 16,399 (0x400F)
This register enables the differential path and sets the volume control for the right differential PGA input.
Bit 7
Table 34. Right Differential Input Volume Control Register
Bits
[7:2]
1
0
R10: Record Microphone Bias Control, 16,400 (0x4010)
This register controls the MICBIAS pin settings for biasing electret type analog microphones.
Bit 7
Table 35. Record Microphone Bias Control Register
Bits
3
2
0
Bit Name
MPERF
MBI
MBIEN
Bit Name
RDVOL[5:0]
RDMUTE
RDEN
Bit 6
Bit 6
Description
Microphone bias is enabled for high performance or normal operation. High performance operation sources
more current to the microphone.
0 = normal operation (default).
1 = high performance.
Microphone voltage bias as a fraction of AVDD.
0 = 0.90 × AVDD (default).
1 = 0.65 × AVDD.
Enables the MICBIAS output.
0 = disabled (default).
1 = enabled.
Description
Right channel differential PGA input volume control. The right differential input uses the RINP (positive signal)
and RINN (negative signal) pins. Each step corresponds to a 0.75 dB increase in gain. See Table 69 for a complete
list of the volume settings.
Setting
000000
000001
…
010000
…
111110
111111
Right differential input mute control.
0 = mute (default).
1 = unmute.
Right differential PGA enable. When enabled, the RINP and RINN pins are used as a full differential pair. When
disabled, these two pins are configured as two single-ended inputs with the signals routed around the PGA.
0 = disabled (default).
1 = enabled.
Reserved
Bit 5
Bit 5
RDVOL[5:0]
Bit 4
Bit 4
Volume
−12 dB (default)
−11.25 dB
…
0 dB
…
34.5 dB
35.25 dB
Rev. 0 | Page 50 of 76
Bit 3
Bit 3
MPERF
Bit 2
Bit 2
MBI
Bit 1
RDMUTE
Bit 1
Reserved
Bit 0
RDEN
Bit 0
MBIEN