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AS3418

Datasheet

• PUBLIC

DS000507

• v4-00 • 2020-Jan-23

│ 60

Addr: 0x0E

MONITOR_MODE1

Bit

Bit Name

Default

Access

Bit Description

10: 400ms

11: 600ms

1:0

MON_HPH_M

UX<1:0>

R/W

This register selects the ANC input source for the

headphone amplifier in Monitor mode. Depending on

the register setting different outputs are routed to the

headphone amplifier input. It is also possible to

disconnect all ANC input sources which is sometimes

desired in monitor mode.

00: QMIC outputs are connected to HPH input

01: OP1 outputs are connected to HPH input

10: Do not use (reserved for OP2)

11: QMIC, OP1 are disconnected from HPH

Figure 82:

MON_MIC_LEFT_GAIN Register Description

Addr: 0x0F

MON_MIC_LEFT_GAIN

Bit

Bit Name

Default

Access

Bit Description

6:0

MON_MIC_LE

FT_GAIN

101

0111

R/W

Volume settings for left microphone input, adjustable

in 63 steps of 0.5dB for Monitor operation mode.

000 0000: 0dB

000 0001: 0.5dB gain

000 0010: 1.0dB gain

000 0011: 1.5dB gain

…

011 1110: 31dB gain

011 1111: Do not use

101 0111: MUTE (Mute code if NEG_ATT_EN bit

set)

111 1111: MUTE (Mute code if NEG_ATT_EN bit

not set)

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