adau1461 Analog Devices, Inc., adau1461 Datasheet - Page 63

• Manufacturer Part Number: adau1461
• Description: Sigmadsp Stereo, Low Power, 96 Khz, 24-bit Audio Codec With Integrated Pll Adau1461
• Manufacturer: Analog Devices, Inc.

R19: ADC Control, 16,409 (0x4019)
Bit 7
Reserved
Table 51. ADC Control Register
Bits
6
5
4
3
2
[1:0]
R20: Left Input Digital Volume, 16,410 (0x401A)
Bit 7
Table 52. Left Input Digital Volume Register
Bits
[7:0]
Bit Name
ADCPOL
HPF
DMPOL
DMSW
INSEL
ADCEN[1:0]
Bit Name
LADVOL[7:0]
Bit 6
ADCPOL
Bit 6
Description
Invert input polarity.
0 = normal (default).
1 = inverted.
ADC high-pass filter select. At 48 kHz, f
0 = off (default).
1 = on.
Digital microphone data polarity swap.
0 = invert polarity.
1 = normal (default).
Digital microphone channel swap. Normal operation sends the left channel on the rising edge of the clock and
the right channel on the falling edge of the clock.
0 = normal (default).
1 = swap left and right channels.
Digital microphone input select. When asserted, the on-chip ADCs are off, BCLK is master at 128 × f
ADC_SDATA is expected to have left and right channels interleaved.
0 = digital microphone inputs off, ADCs enabled (default).
1 = digital microphone inputs enabled, ADCs off.
ADC enable.
Setting
00
01
10
11
Description
Controls the digital volume attenuation for left channel inputs from either the left ADC or the left digital
microphone input. Each bit corresponds to a 0.375 dB step with slewing between settings. See Table 92 for a
complete list of the volume settings.
Setting
00000000
00000001
00000010
…
11111110
11111111
Bit 5
HPF
Bit 5
Bit 4
DMPOL
Bit 4
ADCs Enabled
Both off (default)
Left on
Right on
Both on
Volume Attenuation
0 dB (default)
−0.375 dB
−0.75 dB
…
−95.25 dB
−95.625 dB
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LADVOL[7:0]
3dB
= 2 Hz.
Bit 3
DMSW
Bit 3
Bit 2
Bit 2
INSEL
Bit 1
Bit 1
ADCEN[1:0]
ADAU1461
Bit 0
Bit 0
S
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