AR1000_16 Datasheet, PDF (26/61 Pages) Microchip Technology – AR1000 Series Resistive Touch Screen Controller

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:
1. Pen Down (initial touch)
User defined 0-3 touch reports, with selectable pen
states.
2. Pen Movement (touch movement after initial
touch)
User defined no-touch reports or streaming touch
reports, with selectable pen states.
3. 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
DS40001393C-page 26
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