AR1010T-ISLASHML datasheet(31/70 Pages) MICROCHIP

31 / 70 page

 2009-2012 Microchip Technology Inc.

Preliminary

DS41393B-page 31

AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER

8.2.8

SleepDelay Register (OFFSET 0x0A)

The SleepDelay register sets the time duration with no

touch or command activity that will cause the controller

to enter a low-power Sleep mode. Valid values are as

follows:

0 ≤ SleepDelay ≤ 255

Sleep Delay Time = SleepDelay * 100 ms; when Sleep-

Delay > 0

A value of zero disables the Sleep mode, such that the

controller will never enter low-power Sleep mode.

A touch event will wake the controller from low-power

Sleep mode and start sending touch reports. Commu-

nications sent to the controller will wake it from the low-

power Sleep mode and initiate action to the command.

8.2.9

PenUpDelay Register (OFFSET

0x0B)

The PenUpDelay register sets the duration of a pen-up

event that the controller will allow, without sending a

pen-up report for the event. The delay time is started

upon detecting a pen-up condition.

If a pen down is reestablished before the delay time

expires, then pen-down reports will continue without a

pen up being sent. This effectively debounces a touch

event in process.

A lower value will make the controller more responsive

to pen ups, but will cause more touch drop outs with a

lighter touch. A higher value will make the controller

less responsive to pen ups, but will reduce the number

of touch drop outs with a lighter touch. Valid values are

as follows:

0 ≤ PenUpDelay ≤ 255

Pen-up Delay Time ≈ PenUpDelay * 240 μs

8.2.10

TouchMode Register (OFFSET 0x0C)

The TouchMode register configures the action taken for

various touch states.

There are three states of touch for the controller’s touch

reporting action which can be independently controlled.

Touch States:

Pen Down (initial touch)

User defined 0-3 touch reports, with selectable pen

states.

Pen Movement (touch movement after initial

touch)

User defined no-touch reports or streaming touch

reports, with selectable pen states.

Pen Up (touch release)

User defined 0-3 touch reports, with selectable pen

states.

Every touch report includes a “P” (Pen) bit that

indicates the pen state.

• Pen Down: P = 1

• Pen Up:

P = 0

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