AS3412 datasheet(58/84 Pages) AMSCO

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[v1-00] 2016-Apr-06

AS3412 − Register Description

Figure 73:

ANC_L2 Register Description

Name

Address

Default Value

ANC_L2

0x11

00h

The ANC_L2 Register configures the gain for the left microphone input. This register is the first alternative

microphone gain register for OTP programming in case the ANC_L register is already programmed.

Bit

Bit Name

Default

Access

Bit Description

7ALT2_ENABLE

R/W

In case the register is being used for microphone

programming this bit has to be set. The bit is being

used by the internal state machine of the AS3412 to

determine which alternative microphone gain register

has to be used during startup.

0: Microphone registers 0x10 and 0x11 are not

active

1: Microphone registers 0x10 and 0x11 are active.

Gain settings in registers 0x30 and 0x31 are

ignored

5:0

MICL_VOL_

OTP2<6:0>

000 0000

R/W

Volume settings for left microphone input, adjustable

in 63 steps of 0.5dB

00 0000: MUTE

00 0001: 0dB gain

00 0010: 0.5dB gain

00 0011: 1.0dB gain

…

11 1110: 30.5dB gain

11 1111: 31dB gain

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