adau1381 Analog Devices, Inc., adau1381 Datasheet - Page 66

• Manufacturer Part Number: adau1381
• Description: Low-noise Stereo Codec With Enhanced Recording And Playback Processing
• Manufacturer: Analog Devices, Inc.

ADAU1381
Register 16423 (0x4027), Playback Speaker Output
Control
Bits[7:6], Speaker Output Gain Control
These bits control the gain of the speaker output. In general, this
parameter should be tuned at a system level, set once during system
initialization and not altered during operation of the system.
Bit 0, Speaker Output Enable
This bit enables the speaker output. It initiates the speaker power-
up and power-down sequences shown in Figure 36 and Figure 37.
Table 53. Playback Speaker Output Control Register
Bits
[7:6]
[5:1]
0
Table 54. Beep Zero-Crossing Detector Control Register
Bits
[7:5]
[4:3]
[2:1]
0
Description
Reserved
Detector timeout
00: 20 ms
01: 10 ms
10: 5 ms
11: 2.5 ms
Reserved
Zero-crossing detector enable
0: disabled
1: enabled
Description
Speaker output gain control
00: 0 dB
01: 2 dB
10: 4 dB
11: 6 dB
Reserved
Speaker output enable
0: disabled
1: enabled
Rev. A | Page 66 of 84
Register 16424 (0x4028), Beep Zero-Crossing Detector
Control
Bits[4:3], Detector Timeout
The timeout detector waits the specified amount of time for a
beep zero crossing before forcing the mute or unmute in the
playback path beep gains (that is, the left playback beep gain,
right playback beep gain, and mono playback beep gain).
Bit 0, Zero-Crossing Detector Enable
This bit enables the zero-crossing detector. Disabling the beep
zero-crossing detector may cause clicks and pops on the output
when using the beep path.
Default
00
0
Default
11
1