AS3412 datasheet(60/84 Pages) AMSCO

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[v1-00] 2016-Apr-06

AS3412 − Register Description

Figure 75:

ANC_L3 Register Description

Name

Address

Default Value

ANC_L3

0x13

00h

The ANC_L3 Register configures the gain for the left microphone input. This register is the second alternative

microphone gain register for OTP programming in case the ANC_L and ANC_L2 registers are already

programmed.

Bit

Bit Name

Default

Access

Bit Description

7ALT3_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 0x12 and 0x13 are not

active

1: Microphone registers 0x12 and 0x13 are active.

Gain settings in registers 0x30, 0x31, 0x10 and

0x11 are ignored.

5:0

MICL_VOL_

OTP3<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: 31dB gain

11 1111: 31dB gain

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