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AS3421 Datasheet(PDF) 39 Page - ams AG

Part # AS3421
Description  Low Power Ambient Noise-Cancel l ing Speaker Dr iver
PDF  61 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3421 Datasheet(HTML) 39 Page - ams AG

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Revision 0.90
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AS3421 AS3422
Datasheet - R e g i s t e r D e s c r i p t i o n
Table 32. ANC_R Register
Name
Base
Default
ANC_R
2-wire serial
80h (OTP)
Offset: 31h
Right OTP Microphone Input Register
Configures the gain for the left microphone input. This is a special register, writing needs to be enabled by
writing 10b to Reg 3Fh first. This register is reset at POR and gets loaded with the OTP fuse contents.
Bit
Bit Name
Default
Access
Bit Description
7
TEST_BIT_2
1
R
for testing purpose only
6:0
MICR_VOL_OTP
<6:0>
000 0000
R/W
Volume settings for right microphone input, adjustable in 127 steps of
0.375dB
00 0000: MUTE
00 0001: -11.25dB gain
00 0010: -10.875 dB gain
..
11 1110: 35.625dB gain
11 1111: 36 dB gain



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