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AS3412 데이터시트(PDF) 33 Page - ams AG

부품명 AS3412
상세설명  The AS3412 is a speaker driver with Ambient Noise Cancelling
PDF  84 Pages
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제조업체  AMSCO [ams AG]
홈페이지  http://www.ams.com
Logo AMSCO - ams AG

AS3412 데이터시트(HTML) 33 Page - ams AG

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ams Datasheet
Page 33
[v1-00] 2016-Apr-06
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AS3412 − Detailed Description
Operation Modes
If the AS3412 is in stand-alone mode (no I²C control), the device
can work in different operation modes. An overview of the
different operation modes is shown in Figure 41.
Figure 41:
Operation Modes
Operation Modes: This table gives an overview of the different operation modes of the AS3412.
With the AS3412 the design engineer has different options to
enter the described operation modes shown in Figure 41. In
addition to the different switch and push button connections
described in the following three chapters, it is also important
to configure the chipset accordingly. Figure 42 shows the
required register configuration settings to enable the different
AS3412 control modes.
Figure 42:
User Interface Control Modes
Stand Alone Operation Mode: Shows the different operation modes that can be selected with push button
control or slide switch control.
MODE
Description
OFF
Chip is turned off.
ANC
Chip is turned on and active noise cancellation is active
MONITOR
In monitor mode, a different (normally higher) microphone preamplifier gain can be configured
to get an amplification of the ambient noise. To get rid of the low pass filtering needed for the
noise cancellation, the headphone input multiplexer can be set to a different (typically MIC)
source to increase speech intelligibility. In addition, the Line Input can be muted to further
enhance speech intelligibility. If the device is operated in I²C mode, it is also possible to enter the
monitor mode by setting the MON_MODE bit in register 0x3D.
PBO
The Playback Only Mode is a special mode that disables the noise cancelling function and just
keeps the line input amplifier as well as the headphone amplifier active.
MODE
Register Name
SLIDE_PWR_UP
SLIDER_MON
Button Mode
0
0
Do not use
0
1
Slider Mode
1
0
Full Slider Mode
1
1



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