CRTOUCH Datasheet, PDF (52/68 Pages) Freescale Semiconductor, Inc – Capacitive and Resistive Touch Sensing Application Specific IC.

Memory Map and Registers Description
4.2.5.2 DC Tracker Rate
Bit
Field
7
6
5
4
3
2
DCTRACKERRATE
1
0
Signal
7–0
DCTRACKERRATE
Description
Determines how often the recalibration function occurs. This number represents the number of
capacitive samples required before recalibration. If this register is set to 0, the DC Tracker
feature is disabled.
0 DC Tracker feature disabled
1–255 DC Tracker executed every n sampling period
4.2.5.3 Response Time register
Bit
Field
7
6
5
4
3
2
1
0
Reserved
RESPTIME
Signal
7–6
Reserved
5–0
RESPTIME
Reserved
Description
Determines the number of measurements required to detect a status change in any electrode.
This value represents the number of capacitive samples required for an electrode status
change detection.
1–32 n measurements to be used
4.2.5.4 Stuck Key Timeout register
Bit
Field
7
6
5
4
3
2
STUCKKEYTOUT
1
0
Signal
7–0
STUCKKEYTOUT
Description
Determines how many mili-seconds must an electrode be detected as touched before
recalibrating that electrode and then detect it as untouched. If this value is set to 0, the stuck
key feature is disabled.
0 Stuck key feature disabled
1–255 Electrode recalibrated after n task executions
CRTouch Data Sheet, Rev. 3
52
Freescale Semiconductor