ADAU1781 Analog Devices, ADAU1781 Datasheet - Page 53

• Manufacturer Part Number: ADAU1781
• Description: SigmaDSP Low-noise Stereo Audio Codec for Portable Applications
• Manufacturer: Analog Devices

Specifications of ADAU1781

• Instructions/cycles: 1024
• Digital I/o Channels: 8/8
• Analog I/o Channels: 2/2
• Product Description: SigmaDSP low-noise stereo audio codec for portable applications

RECORD PATH CONFIGURATION
Register 16392 (0x4008), Digital Microphone and
Analog Beep Control
This register controls the digital microphone settings and the
analog beep input gain.
Bits[5:4], Digital Microphone Enable
These bits control the enable function for the stereo digital
microphones. The analog front end is powered down when
using a digital microphone.
Table 41. Digital Microphone and Analog Beep Control Register
Bits
[7:6]
[5:4]
3
[2:0]
Description
Reserved
Digital microphone enable
00: disabled
01: MICD1 enabled
10: MICD2 enabled
11: reserved
Beep input mute
0: muted
1: unmuted
Beep input gain. Note that Setting 100 sets the input beep gain to −23 dB.
000: 0 dB
001: +6 dB
010: +10 dB
011: +14 dB
100: −23 dB
101: +20 dB
110: +26 dB
111: +32 dB
Rev. B| Page 53 of 92
Bit 3, Beep Input Mute
This bit mutes the beep input.
Bits[2:0], Beep Input Gain
This bit controls the gain setting for the analog beep input; it
defaults at 0 dB and can be set as high as 32 dB. The beep signal
must be enabled in Register 16400 (0x4010), microphone bias
control and beep enable.
ADAU1781
Default
00
0
000