Sensing Solutions EVM GUI
27
SNOU144 – December 2016
Copyright © 2016, Texas Instruments Incorporated
LDC2114 Evaluation Module for Inductive Touch Inductance to Digital
Converter
4.7.6
Channel Settings
In the
Channel Settings
section, each channel can be configured independently. Each channel has its own
enable bit and its own output pin with configurable polarity. The remaining parameters (
Frequency
,
R
P
,
Gain
,
Counter Scale
,
Sensor Cycle Count
, and
Fast Tracking Factor
) should be configured according to
the characteristics of the attached sensor.
4.7.7
Algorithm Settings
The LDC has four additional algorithms, which can be enabled in the
Algorithms Settings
section, as
shown in
1. The
Max-Win
algorithm enables the system to select the button pressed with maximum force when
multiple buttons are pressed at the same time. This feature must be enabled for each applicable
channel individually.
2. The
Anti-Common Mode
algorithm eliminates false detection when a user presses the panel in certain
positions, which could cause a common-mode change to two or more buttons. This feature must be
enabled for each applicable channel individually.
3. The
Anti-Deform
algorithm filters changes due to metal deformation in the vicinity of one or more
buttons. Such metal deformation can be accidentally caused by pressing a neighboring button that
does not have sufficient mechanical isolation. This feature must be enabled for each applicable
channel individually.
4. The
Anti-twist
algorithm reduces the likelihood of false detection when the case is twisted, which could
cause unintended mechanical activation of the buttons, or an opposite reaction in two adjacent buttons.
The anti-twist function can be enabled by configuring the
ANTITWST
setting to a value larger than 0.
4.7.8
Calculator
The
Calculator
does not write any registers and is used for information purposes only. It calculates the
time of the sampling window for each channel based on its configured register settings.
Figure 26. Algorithm Settings and Calculator on Configuration Page