AS3418-EWLM datasheet(52/78 Pages) AMSOSRAM

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AS3418

Datasheet

• PUBLIC

DS000507

• v4-00 • 2020-Jan-23

│ 51

Addr: 0x02

MODE_REG0

Bit

Bit Name

Default

Access

Bit Description

0: Stereo single ended mode

1: Mono differential mode

I2C_MODE

R/W

All registers can be read and written by the I2C

interface independent on the level of I2C_MODE bit

but I2C_MODE controls whether the main modes of

AS3418 (MON/ANC/PBO/ON/OFF) are controlled by

the MON_MODE_EN, PBO_MODE_EN bits and

SYSTEM_STATUS registers or by the buttons and

switches. Once the bit is set and the system powers

up because there’s an I2C start condition applied to

the CSCL and CSDA pins, the user has to write the

PWR_HOLD bit within SHUTDOWN_DELAY,

otherwise AS3418 powers down again.

This can be done either over the CSDA/CSCL or

over the application trimming interface.

0: I2C mode control functions disabled

1: I2C mode control functions enabled

Figure 70:

MODE_REG1 Register Description

Addr: 0x03

MODE_REG1

Bit

Bit Name

Default

Access

Bit Description

PBO_MODE_

R/W

In case I2C_MODE bit is not set, the register content

is ignored but can be read and written. In case

I2C_MODE bit is set, this bit controls the operation

mode of AS3418 (ANC, MON, PBO). In case the

PBO_MODE_EN is 1, MON_MODE_EN has to be 0.

0: ANC Mode

1: PBO Mode

MON_MODE_

R/W

In case I2C_MODE bit is not set, the register content

is ignored but can be read and written. In case

I2C_MODE bit is set, this bit controls the operation

mode of AS3418 (ANC, MON, PBO). In case the

PBO_MODE_EN is 1, MON_MODE_EN has to be 0.

0: ANC Mode

1: MON Mode

ANCMON_MI

CS_BYP_EN

R/W

This bit enables the automatic VBAT to MICS bypass

function when the microphone supply charge pump is

switched off. This function has to be activated in case

the microphone supply voltage regulator is supplied

externally via MICS_CP pin.

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