Datasheet

ADAU1761
Rev. C | Page 76 of 92
R36: DAC Control 0, 16,426 (0x402A)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
DACMONO[1:0]
DACPOL
Reserved
DEMPH
DACEN[1:0]
Table 70. DAC Control 0 Register
Bits Bit Name Description
[7:6] DACMONO[1:0]
DAC mono mode. The DAC channels can be set to mono mode within the DAC and output on the left
channel, the right channel, or both channels.
Setting Mono Mode
00 Stereo (default)
01 Left channel in mono mode
10
Right channel in mono mode
11
Both channels in mono mode
5 DACPOL Invert input polarity of the DACs.
0 = normal (default).
1 = inverted.
2 DEMPH DAC de-emphasis filter enable. The de-emphasis filter is designed for use with a sampling rate of 44.1 kHz only.
0 = disabled (default).
1 = enabled.
[1:0] DACEN[1:0] DAC enable.
Setting DACs Enabled
00 Both off (default)
01 Left on
10
Right on
11 Both on
R37: DAC Control 1, 16,427 (0x402B)
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
LDAVOL[7:0]
Table 71. DAC Control 1 Register
Bits Bit Name Description
[7:0] LDAVOL[7:0]
Controls the digital volume attenuation for left channel inputs from the left DAC. Each bit corresponds to a
0.375 dB step with slewing between settings. See Table 94 for a complete list of the volume settings.
Setting Volume Attenuation
00000000 0 dB (default)
00000001 −0.375 dB
00000010
−0.75 dB
…
…
11111110
−95.25 dB
11111111 −95.625 dB