AS3412 datasheet(67/84 Pages) AMSCO

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ams Datasheet

Page 67

[v1-00] 2016-Apr-06

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AS3412 − Register Description

Figure 84:

MODE_1 Register Description

Name

Address

Default Value

MODE_1

0x34

0x00

This register controls miscellaneous settings of the AS3512.

Bit

Bit Name

Default

Access

Bit Description

7MICS_CP_OFF

R/W

This bit controls the microphone supply charge pump.

The microphone charge pump has a second function

besides the bias voltage generation for microphones.

It is also used to disable the integrated music bypass

switch if the AS3412 is active. In case the integrated

bypass switch is used in an application the MICS_CP_

OFF bit must not be set to ‘1’.

0: Microphone supply charge pump enabled

1: Microphone supply charge pump disabled

6MICS_OFF

R/W

This bit controls the microphone supply. In case this

bit is set to ‘1’ the MICS pin is disconnected from the

internal microphone supply.

0: Microphone supply switched on

1: Microphone supply switched off

MIC_AGC_ON

R/W

This bit disables the automatic gain control of the

microphone preamplifier.

0: AGC disabled

1: AGC enabled

4MIC_OFF

R/W

This bit powers down the microphone preamplifier.

0: Microphone preamplifier enabled

1: Microphone preamplifier disabled

CP_OFF

R/W

This bit disables the VNEG charge pump in case there is

already a negative supply present in a system.

0: VNEG charge pump enabled

1: VNEG charge pump enabled

1HPH_OFF

R/W

This bit allows the user to power down headphone

amplifier in case it is not used in the final application

in order to save system power.

0: Headphone amplifier enabled

1: Headphone amplifier disabled

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