WM9713 datasheet(69/111 Pages) WOLFSON

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Preliminary Technical Data

WM9713L

PTD, March 2004, Rev 2.2

POLL (74h)

Starts a single measurement

CTC (74h)

Starts a co-ordinate measurement at specified conversion rate

COO (74h)

Enables Co-Ordinate mode

ADCSEL (74H)

Specifies the type of measurement to be made

Figure 24 Touchpanel Conversion Flow Diagram

If the SLEN bit is set to ‘1’, then the touchpanel data appears on the AC-Link slot selected by the

SLT control bits, as shown below. The Slot 0 ‘tag’ bit corresponding to the selected time slot is

asserted whenever there is new data on that slot.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

SLEN

Slot Readback Enable

0: Disabled (readback through register only)

1: Enable (readback slot selected by SLT)

76h

2:0

SLT

110

AC’97 Slot Selection for Touchpanel Data

000: Slot 5

001: Slot 6

…

101: Slot 10

110: Slot 11

111: RESERVED

Table 50 Returning Touchpanel Data Through an AC-Link Time Slot

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