WM5102 datasheet(187/334 Pages) WOLFSON

187 / 334 page

Production Data

WM5102

PD, June 2014, Rev 4.2

187

The headphone detection function can also generate a GPIO output, providing an external indication

of the headphone detection. See “General Purpose Input / Output” to configure a GPIO pin for this

function.

The register fields associated with Headphone Detection are described in Table 79. The external

circuit configuration is illustrated in Figure 66.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R549

(0225h)

HP Ctrl 1L

RMV_SHRT_HP1

HPOUT1L Ground Clamp

0 = Enabled

1 = Disabled

This bit must be set to 1 when the

Headphone Detection function is

enabled on HPOUT1L.

This bit is configured automatically when

HPOUT1L is enabled or disabled.

R550

(0226h)

HP Ctrl 1R

RMV_SHRT_HP1

HPOUT1R Ground 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

1:0

ACCDET_MODE

[1:0]

Accessory Detect Mode Select

00 = MICDET measurement

01 = HPDETL measurement

10 = HPDETR measurement

11 = MICDET

Note that the MICDET function is

provided on the MICDET1 or MICDET2

pins, depending on the ACCDET_SRC

R667

(029Bh)

Headphone

Detect 1

10:9

HP_IMPEDANCE

_RANGE [1:0]

Headphone Detect Range

00 = 4 ohms to 80 ohms

01 = 70 ohms to 1k ohms

10 = 1k ohms to 10k ohms

11 = Reserved

7:5

HP_HOLDTIME

[2:0]

001

Headphone Detect Hold Time

(Selects the hold time between ramp up

and ramp down of the headphone detect

current source.)

000 = 31.25us

001 = 125us

010 = 500us

011 = 2ms

100 = 8ms

101 = 16ms

110 = 24ms

111 = 32ms

HP_RATE

Headphone Detect Ramp Rate

0 = Normal rate

1 = Fast rate

HP_POLL

Headphone Detect Enable

Write 1 to start HP Detect function

WM5102 Datasheet(PDF) 187 Page - Wolfson Microelectronics plc

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