CRTOUCH Datasheet, PDF (53/68 Pages) Freescale Semiconductor, Inc – Capacitive and Resistive Touch Sensing Application Specific IC.

Memory Map and Registers Description
4.2.5.5 Electrodes Sensitivity
This set of registers, one per electrode, holds the sensitivity value of each electrode. Sensitivity value is an 8-bit value that
represents the minimum difference between an instant reading versus the baseline required to indicate a touch.
Bit
Field
7
6
5
Reserved
4
3
2
ExSENS
1
0
Signal
7
Reserved
6–0
ExSENS
Description
Represents the capacitance threshold for an electrode to be detected as touched, relative to
the baseline value of that electrode.
2–127 Electrode x (0 to 3) sensitivity
4.2.5.6 Electrodes enablers
This register holds the information of which electrode is enabled. Each bit represents an electrode
Bit
Field
7
6
5
Reserved
4
3
2
1
0
E3EN
E2EN
E1EN E0EN
Signal
3–0
ExEN
1 – Electrode x Enabled
0 – Electrode x Disabled
Description
4.2.5.7 Low Power Scan Period register
Represents the value of the scan period in the low power mode, this range does not represent a linear (ms) scan interval.
Bit
Field
7
6
5
4
3
Reserved
2
1
0
LPSP
CRTouch Data Sheet, Rev. 3
Freescale Semiconductor
53