DM183026 Microchip Technology, DM183026 Datasheet - Page 16

• 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

mTouch™ Capacitive Evaluation Kit User’s Guide
2.2
DS41385A-page 12
INDIVIDUAL TOUCH SENSE DEMONSTRATIONS
2.1.2
By design, the demo application is designed to respond to a state change event on any
sensor. More simply, they respond to a touch, and not to a touch and release. This
behavior, along with the firmware’s slow averaging algorithm that accounts for constant
changes in the demo board’s environment, causes a continuous touch on one or more
sensors to yield an affirmative response for a few seconds, followed eventually by no
response at all. Removing the touch stimulus from the sensor resets the algorithm and
restores the sensor’s responsiveness.
2.2.1
The Direct Key Plug-in board is an 8-channel plug-in board with one key directly
mapped to one channel. This can be interfaced with any of the 8 channels of the
16 channels provided in the mTouch Capacitive Evaluation Kit. Touching any one of the
keys on the plug-in board will light up the corresponding LED in the evaluation board.
The LEDs, D8 to D15 of the evaluation board, correspond to the direct keys numbered
from ‘8’ to ‘F’, respectively, in the Direct Key Plug-in board.
The default firmware loaded in the mTouch Capacitive Evaluation Kit is configured for
channels 8 to 15.
When the key numbered ‘8’ is pressed, the LED D8 will be lit. Similarly, when keys ‘9’
through ‘F’ are pressed, the LEDs D9 through D15 will be lit. Here, one LED will be lit
for every press key on the plug-in board (see Figure 2-1).
FIGURE 2-1:
2.2.2
The Matrix Key Plug-in board is an array of 12 touch-sensitive keys arranged in a 4x3
matrix. Touching any one of the keys will light up one of the LEDs. Here, the Matrix Key
Plug-in board is numbered 0 to 11, which corresponds to LEDs D1 to D12, respectively.
The default firmware loaded in the mTouch Capacitive Evaluation Kit for the Matrix Key
Plug-in board is configured for channels 8 to 15.
When the key numbered ‘0’ is pressed, the LED D1 will be lit. Similarly, when the keys
numbered ‘1’ to ‘11’ are pressed, the LEDs D2 through D12 will be lit, respectively.
Here, one LED will be lit for every press of the key on the plug-in board.
Sensor Persistence
Direct 8 Key Plug-in Board
Matrix Key Plug-in Board
DEFAULT PLUG-IN CHANNELS FOR 8-KEY PLUG-IN BOARD
© 2009 Microchip Technology Inc.