AS3415 datasheet(73/102 Pages) AMSCO

73 / 102 page

ams Datasheet, Confidential: 2014-Jun-13 [v1-30]

AS3415/AS3435 – 73

Reg i st er Description

Figure 92:

MONITOR_MODE Register Description

Name

Address

Default Value

MONITOR_MODE

0x15

00h

The MONITOR_MODE register controls various settings for the chipset in monitor mode like line input monitor

mode attenuation as well as which audio inputs are active.

Bit

Bit Name

Default

Access

Bit Description

7:6

MON_HPH_MUX<1:0>

R/W

This register selects the ANC input source for the

headphone amplifier in monitor mode. Depending

on the register setting the outputs of microphone

preamplifier, OPAMP1, OPAMP2 can be connected

to the headphone amplifier input.

00: QMIC outputs are connected to HPH input

01: OP1 outputs are connected to HPH input

10: OP2 outputs are connected to HPH input

11: Nothing connected to HPH input except line

input and mixer input in case they are enabled.

MON_LIN_MUTE

R/W

This bit defines the status of the line input mute

switch in monitor mode. If the bit is set to ‘1’ the

line input amplifier is disconnected from the

headphone amplifier.

0: Line Input Mute disabled

1: Line Input Mute enabled

MON_MIX_ENABLE

R/W

This bit enables the headphone mixer input pin to

mix external signals to the headphone amplifier in

playback only mode.

0: HPH mixer input disabled

1: HPH mixer input enabled

3:2

MON_LIN_ATT<1:0>

R/W

This register controls the line put gain in monitor

mode. Per default the line input is muted. With this

-36dB in 6dB steps.

00: 0dB line input gain in monitor mode

01: -24dB line input gain in monitor mode

10: -30dB line input gain in monitor mode

11: -36dB line input gain in monitor mode

SLIDER_MON

R/W

This bit enables the Full Slider Mode configuration.

Please mind that this bit must not be set without

setting SLIDE_PWR_UP to ‘1’.

0: Slider Mode activated

1: Full Slider Mode activated

DISABLE_MONITOR

R/W

This bit disables the monitor mode in push button

control mode.

0: Monitor mode enabled

1: Monitor mode disabled

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