ADAU1382 Datasheet, PDF (64/84 Pages) Analog Devices – Low Noise Stereo Codec with Recording and Playback Processing

ADAU1382
Register 16415 (0x401F), Playback Mono Mixer Control
Bit 7, Left DAC Mute
This bit mutes the left DAC output, but does not power down
the DAC. Use of this bit does not result in power savings.
Bit 6, Right DAC Mute
This bit mutes the right DAC output, but does not power down
the DAC. Use of this bit does not result in power savings.
Bits[5:2], Mono Playback Beep Gain
These bits set the gain of the beep output signal in mono mode.
If the zero-crossing detector is active, then the gain change
takes place on the next zero crossing in the beep signal or when
the timeout occurs, whichever comes first.
Bit 0, Mono Output Mute
This bit mutes the mono line output.
Table 49. Playback Mono Mixer Control Register
Bits
Description
7
Left DAC mute
0: muted
1: unmuted
6
Right DAC mute
0: muted
1: unmuted
[5:2]
Mono playback beep gain
0000: muted
0001: −15 dB
0010: −12 dB
0011: −9 dB
0100: −6 dB
0101: −3 dB
0110: 0 dB
0111: +3 dB
1000: +6 dB
1
Reserved
0
Mono output mute (active low)
0: muted
1: unmuted
Register 16416 (0x4020), Playback Clamp Amp Control
The playback clamp amp is an amplifier on the line output path.
If the line outputs are muted using Register 16421 (0x4025), left
line output mute, or Register 16422 (0x4026), right line output
mute, this amplifier serves to maintain a common-mode voltage
on the line output pins. This helps to avoid a pop or click when
the line outputs are reenabled.
Bit 1, Clamp Amplifier Power Saving Mode
The clamp amplifier has two operating modes: high power
mode and low power mode. The high power mode has more
current available to maintain a stable common-mode voltage on
the output pins. The low power mode may be slightly less stable,
depending on operating conditions, but saves several microamps.
Bit 0, Clamp Amplifier Control
This bit enables or disables the clamp amp. It is enabled by default.
The clamp amp should usually be enabled in systems where the
line outputs are used.
Default
0
0
0000
0
Table 50. Playback Clamp Amplifier Control Register
Bits
Description
[7:2]
Reserved
1
Clamp amplifier power saving mode
0: high power
1: low power
0
Clamp amplifier control
0: enabled
1: disabled
Default
1
0
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