WM8281ECSSLASHR datasheet(217/392 Pages) CIRRUS

217 / 392 page

WM8281

Rev 4.0

217

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R550

(0226h)

HP Ctrl 1R

HP1R_FLWR

HPOUT1R Voltage Follower mode

0 = Disabled

1 = Enabled

This bit must be set to 0 when the

Headphone Detection function is

enabled on HPOUT1R.

This bit is configured automatically when

HPOUT1R is enabled or disabled.

HP1R_SHRTI

HPOUT1R Input Clamp

0 = Disabled

1 = Enabled

This bit must be set to 0 when the

Headphone Detection function is

enabled on HPOUT1R.

This bit is configured automatically when

HPOUT1R is enabled or disabled.

HP1R_SHRTO

HPOUT1R Output Clamp

0 = Enabled

1 = Disabled

This bit must be set to 1 when the

Headphone Detection function is

enabled on HPOUT1R.

This bit is configured automatically when

HPOUT1R is enabled or disabled.

R659

(0293h)

Accessory

Detect

Mode 1

ACCDET_SRC

Accessory Detect / Headphone

Feedback pin select

0 = Accessory detect on MICDET1,

Headphone ground feedback on

HPOUT1FB1

1 = Accessory detect on MICDET2,

Headphone ground feedback on

HPOUT1FB2

2:0

ACCDET_MODE

[2:0]

Accessory Detect Mode Select

000 = Microphone detect (MICDETn,

discrete mode)

001 = Headphone detect (HPDETL)

010 = Headphone detect (HPDETR)

011 = Reserved

100 = Headphone detect (MICDETn)

101 = Reserved

110 = Reserved

111 = Microphone detect (MICDETn,

ADC mode)

Note that the MICDETn measurements

are implemented on either the MICDET1

or MICDET2 pins, depending on the

ACCDET_SRC register bit.

R667

(029Bh)

Headphone

Detect 1

10:9

HP_IMPEDANCE

_RANGE [1:0]

Headphone Detect Range

00 = 4 ohms to 30 ohms

01 = 8 ohms to 100 ohms

10 = 100 ohms to 1k ohms

11 = 1k ohms to 10k ohms

Only valid when ACCDET_MODE=001

or ACCDET_MODE=010.

WM8281ECS/R Datasheet(PDF) 217 Page - Cirrus Logic

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