Datasheet

AR1100 RESISTIVE USB AND RS-232 TOUCH SCREEN CONTROLLER
DS41606B-page 28  2011 Microchip Technology Inc.
6.15 Register 14: CalibrationInset
The CalibrationInset value specifies the ‘inset’ (margin)
from the edge of the sensor to the perimeter calibration
points. The remaining calibration points (for 9P and
25P) are evenly spaced between the margins. The
inset is in units of 1/256 of the sensor dimension(s) and
is 2x the margin – e.g. a value of 64 is 64/256ths of the
screen dimension (25%) – each margin (top, bottom,
left, right) is 12.5%.
6.16 Register 15: PenStateReportDelay
The PenStateReportDelay value sets the time delay
between successive touch reports in a multiple-report
sequence called for by TouchModes.
6.17 Register 17: TouchReportDelay
The TouchReportDelay value sets the time delay
between successive touch reports. This can be used to
reduce the volume/speed of touch reports, thereby
reducing the burden on the host to process the touch
reports.
6.18 Register 18: RisetimeDefault
(ADVANCED – DO NOT CHANGE)
The RisetimeModifier value is used in the proprietary
algorithm measuring and reacting to sensor
characteristic(s).
6.19 Register 19: RisetimeModifier
(ADVANCED – DO NOT CHANGE)
The RisetimeModifier value is used in the proprietary
algorithm measuring and reacting to sensor
characteristic(s).
6.20 Register 20: Status
The STATUS register provides useful feedback to the
host on AR1100 operational status.
6.21 Register 21: Debug
The Debug register contains bit flags enabling various
debug functions.
Status[7:7] TCHK Result of touch check diagnostic
Status[6:6] EEV Parameters in EEPROM were valid and automatically loaded
Status[5:5] CALV Calibration valid (EEPROM contains valid cal coefficients)
Status[4:4] JMP State of mode input 1: open (jumper off), 0: grounded (jumper on)
Status[3:3] DRT Dynamic risetime CAP successfully measured
Status[2:2] 8W Configured for 8W sensor (4W will also be set)
Status[1:1] 5W Configured for 5W sensor
Status[0:0] 4W Configured for 4W sensor