WM9712CLGEFLSLASHV datasheet(70/78 Pages) WOLFSON

70 / 78 page

WM9712L

Production Data

PD, Rev 4.6, November 2011

controls the input signal of the auxiliary DAC.

REG

ADDR

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

64h

XSLE

Selects input for AUXDAC. 0=from AUXDACVAL (for DC

signals), 1=from AC-Link slot (for AC signals)

Auxiliary DAC

14:12

AUXDACSLT

000 (Slot 5)

Selects input slot for AUXDAC (with XSLE=1)

11:0

AUXDACVAL

000000000

AUXDAC Digital Input for AUXDAC (with XSLE=0). 000h=

minimum, FFFh=full-scale

Registers 76h, 78h and 7Ah

control the touchpanel interface.

REG

ADDR

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

76h

POLL

Writing “1” starts a measurement (this bit resets itself)

Touchpanel

Interface

14:12

ADCSEL

000 (none)

Selects measurement type

COO

0 (OFF)

Enables co-ordinate mode

CTC

0 (polling)

Enables continuous conversions

9:8

00 (93.75Hz)

Controls conversion rate in continuous mode

7:4

DEL

0000 (20.8

s)

Controls touchpanel settling time

SLEN

Enables slot readback of touchpanel data

2:0

SLT

Selects time slot for readback of touchpanel data

78h

15:14

PRP

Selects mode of operation. 00=OFF, 01=pen detect with wake-

up, 10=pen detect without wake-up, 11=running

RPR

Selects wake-up mode. 0=AC-Link only, 1=AC-Link and

WM9712L auto-wake-up

45W

0 (4-wire)

Selects 4-wire or 5-wire touchpanel

PDEN

0 (always)

Selects when touchpanel measurements take place. 0=always,

1=only when pen is down

WAIT

Controls data readback from register 7Ah. 0=overwrite old data

with new, 1=wait until old data has been read

PIL

0 (200

A)

Controls current used for pressure measurement. 1=400

A

7:6

MSK

00 (OFF)

Controls MASK feature

5:0

RPU

000001 (64k

)

Controls internal pull-up resistor for pen-down detection

7Ah

read

only

PNDN

0 (pen up)

Indicates pen status.

14:12

ADCSRC

000 (none)

Indicates measurement type

11:0

ADCD

000h

Returns data from touchpanel / AUXADC

are read-only registers that indicate to the driver that the CODEC is a WM9712L.

REG

ADDR

BIT

LABEL

DEFAULT

DESCRIPTION

REFER TO

7Ch

15:8

F7:0

57h

ASCII character “W” for Wolfson

Intel’s AC’97

Component

Specification,

Revision 2.2,

page 50

7:0

S7:0

4Dh

ASCII character “M”

7Eh

15:8

T7:0

4Ch

ASCII character “L”

7:0

REV7:0

12h

12 for WM9712L

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