ADAU1761BCPZ-R7 datasheet(68/92 Pages) AD

68 / 92 page

Data Sheet

ADAU1761

CONTROL REGISTERS

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Rev. F | 68 of 92

Table 89. Playback L/R Mixer Right (Mixer 6) Line Output Control Register (Continued)

Bits

Bit Name

Description

Setting

Gain Boost

Mute (default)

0 dB output (−6 dB gain on each of the two inputs)

6 dB output (0 dB gain on each of the two inputs)

Reserved

MX6EN

Mixer 6 enable.

0 = disabled (default).

1 = enabled.

R28: Playback L/R Mixer Mono Output (Mixer 7) Control, 16,418 (0x4022)

Table 90.

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Reserved

MX7[1:0]

MX7EN

Table 91. Playback L/R Mixer Mono Output (Mixer 7) Control Register

Bits

Bit Name

Description

[2:1]

MX7[1:0]

L/R mono playback mixer (Mixer 7). Mixes the left and right playback mixers (Mixer 3 and Mixer 4) with either a 0 dB or 6 dB gain boost.

Additionally, this mixer can operate as a common-mode output, which is used as the virtual ground in a capless headphone configuration.

Setting

Gain Boost

Common-mode output (default)

0 dB output (−6 dB gain on each of the two inputs)

6 dB output (0 dB gain on each of the two inputs)

Reserved

MX7EN

Mixer 7 enable.

0 = disabled (default).

1 = enabled.

R29: Playback Headphone Left Volume Control, 16,419 (0x4023)

Table 92.

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

LHPVOL[5:0]

LHPM

HPEN

Table 93. Playback Headphone Left Volume Control Register

Bits

Bit Name

Description

[7:2]

LHPVOL[5:0]

Headphone volume control for left channel, LHP output. Each 1-bit step corresponds to a 1 dB increase in volume. See Table 152 for a

complete list of the volume settings.

Setting

Volume

000000

−57 dB (default)

…

111001

0 dB

…

111111

6 dB

LHPM

Headphone mute for left channel, LHP output (active low).

0 = mute.

1 = unmute (default).

HPEN

Headphone volume control enable. Logical OR with the HPMODE bit in Register R30. If either the HPEN bit or the HPMODE bit is set to 1,

the headphone output is enabled.

ADAU1761BCPZ-R7 Datenblatt(PDF) 68 Page - Analog Devices

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