DM164125 Microchip Technology, DM164125 Datasheet - Page 15

• Manufacturer Part Number: DM164125
• Description: BOARD DEMO PICDEM TOUCH SENSE 1
• Manufacturer: Microchip Technology
• Series: mTouch™, PICDEM™r

Specifications of DM164125

• Mfg Application Notes: Intro to Capacitive Sensing Appl Notes Layout and Physical Design Appl Note
• Sensor Type: Touch, Capacitive
• Interface: Microprocessor
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: PIC16F677, PIC16F887
• Kit Contents: Touch Sense 1 Board, PICKit Serial Analyzer, And MTouch CD W/ Docs
• Tool / Board Applications: Capacitive MTouch Sensors
• Kit Application Type: Capacitive Touch Sensing
• Silicon Family Name: PICDEM
• Features: Directional Pad, Keypad And
• Rohs Compliant: Yes
• For Use With: MTouch Sensing Solutions
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2008 Microchip Technology Inc.
2.4.6
In the mTouch Diagnostic Tool window, select Settings. The Settings window shown in
Figure 2-6 should now display.
FIGURE 2-6:
In the Settings window change the value in the Global Limit window to 20000 and press
the Save Settings Now button. The mTouch Diagnostic Tool window gauges should
now all be scaled to a maximum upper limit of 20000 counts.
Deselect the Enable Polling feature in the Settings window to disable software polling
of the individual Keypad Keys. Touching the Keypad now has no effect on the individual
gauges in the mTouch Diagnostic Tool window. Select Enable Polling once again.
The Settings window also allows the user to save settings for the next time the tool is
used.
Alternately, the AutoScale button
window can be used to scale both Upper and Lower Limits based on current average
values.
2.4.7
Each touch pad (Key ‘0’ shown) on the PICDEM Touch Sense 1 Board is represented
by its own individual gauge in the mTouch Diagnostic Tool window. This adjustable
gauge can be used to either analyze and/or change functional characteristics of the
associated pad as shown in Figure 2-7.
FIGURE 2-7:
Relaxation Oscillator
Frequency
Running Average
(cumulative reading)
mTouch Diagnostic Tool Window Configuration
mTouch Diagnostic Tool Gauges
Guard Band (Blue)
SETTINGS WINDOW
GAUGE INFORMATION FOR KEYPAD KEY ‘0’
found at the top of the mTouch Diagnostic Tool
Key being gauged Band (Blue)
Running Average (Orange)
Trip Level (Green)
Raw data (instantaneous reading)
DS41346A-page 12