DM183026 Microchip Technology, DM183026 Datasheet - Page 23

• Manufacturer Part Number: DM183026
• Description: KIT EVALUATION PIC16F/PIC24F
• Manufacturer: Microchip Technology
• Series: mTouch™r

Specifications of DM183026

• Sensor Type: Touch, Capacitive
• Embedded: Yes, Other
• Utilized Ic / Part: PIC16F727, PIC24FJ128GB106
• Processor To Be Evaluated: PIC16F, PIC24F
• Interface Type: USB
• Silicon Manufacturer: Microchip
• Kit Application Type: Sensing - Touch / Proximity
• Application Sub Type: Capacitive Touch
• Kit Contents: 6x Brds, Analyser, Cable, CD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Interface: -
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2009 Microchip Technology Inc.
The Enable Polling checkbox enables communication with the evaluation boards and
the real-time display of sensor information. The USB portion of the mTouch sensing
solution remains operational and communicates with the demo board even when the
box is unchecked. If the checkbox is unselected, the last polled values from the board
remain on the bar graphs until Enable Polling is selected again. The latest data is
displayed at that time and normal polling resumes. This makes the checkbox useful as
a “Freeze” or pause button.
The Trip & Guardband configures the interaction between the mTouch sensing
solution and the evaluation boards with regards to guardband and trip point settings.
There are two option buttons:
• Default to Firmware Values enables the trip and guardband values to be
• Use Saved Values enables the values entered into the mTouch sensing solution
The Retention area of the Settings subwindow determines how these settings of the
mTouch sensing solution are saved:
• Global minimum and maximum limits for bar graphs
• Auto-scaling settings
• Trip and guardband settings
When the Save Settings When Finished default checkbox is selected, all of the above
settings are saved to permanent storage on the PC when the mTouch sensing solution
is closed. Clicking the Save Settings Now button immediately saves all of the above
values to permanent storage on the PC. In both cases, all settings are restored when
the application is restarted.
Leaving Save Settings When Finished unselected allows users to save working
configurations at their discretion by using the Save Settings Now button. This allows
for experimentation with the ability to return to “known good” settings by quitting the
mTouch sensing solution and restarting it.
3.2.2.2
In addition to global display settings, each of the sensor channels can be individually
configured to adjust its behavior and specific display properties. To do this, left-click
directly on top of any channel’s bar graph; the Setup dialog box for that channel
appears (Figure 3-5).
Clicking on another channel while a Setup dialog box is open does not close the
original window or open a second Setup dialog box. Instead, the dialog box becomes
the Setup dialog box for the channel most recently selected.
The upper portion of the Setup dialog box allows the user to set individual values for
the Guardband and Trip Level for each sensor channel. Both variables have a valid
range of 0 to 65535. Each point has an additional Visible checkbox that determines if
the value is to be displayed on the bar graph.
calculated by the demo board’s firmware, using an algorithm that calculates the
optimum trip and guardband values based on the average value. These values
are sent to the mTouch sensing solution tool via the USB connection, and are
constantly updated and displayed on the bar graphs; this is enabled by default.
to be sent to, and used by, the evaluation board via USB. The trip and guardband
values set by the mTouch sensing solution by user input are static, and only
change when the user changes them.
Note 1:
INDIVIDUAL SENSOR DISPLAY SETUP
Using the mTouch™ Sensing Solution
The Use Saved Values radio button must be set for these values to
be valid and used by the evaluation board. See Section 3.2.2.1 “Global
Diagnostic Window Settings” for more information.
DS41385A-page 19