DM164128 Microchip Technology, DM164128 Datasheet - Page 25

• Manufacturer Part Number: DM164128
• Description: KIT DEV PICDEM TOUCH SENSE 2
• Manufacturer: Microchip Technology
• Series: mTouch™r

Specifications of DM164128

• Sensor Type: Touch, Capacitive
• Interface: Microprocessor
• Embedded: Yes, MCU, 16-Bit
• Utilized Ic / Part: PIC24F
• Silicon Manufacturer: Microchip
• Silicon Core Number: PIC24F256GB110
• Features: ICSP Programming Capability, Directional Pad, Keypad And Slider Sensor
• Kit Contents: Board
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Sensitivity: -
• Sensing Range: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.2
FIGURE 4-3:
TABLE 4-1:
© 2008 Microchip Technology Inc.
Ref
10
1
2
3
4
5
6
7
8
9
BOARD COMPONENTS
10
PIC24FJ256GB110 Microcontroller (U1)
USB mini-B Receptacle (J3)
ICSP™ Programming Header (J1)
Power Supply (D18, Q1)
Piezo Speaker (BZ1)
Directional Touch Sensor LEDs (D19-24, D26-27, D38)
Directional Touch Sensor Area – Front of Board (ROT1)
Numeric Keypad Area – Sensors on Front of Board (S1-12, S21-28, D1-10, D28-37)
Touch Slider Area – Sensor on Front of Board (S14, D12-17, D39-64)
Power Touch Switch – Sensor on Front of Board (S20, D65)
BOARD COMPONENTS
The microcontroller uses its on-chip USB engine and transceiver to communicate the
PC side interface application, using the USB mini-B receptacle. The demo board also
uses the USB receptacle for application power as a bus-powered device.
Microcontroller and LED power is provided from the V
regulator. Provisions on the board allow for users to add components and create an
externally powered application.
For users interested in using the Touch Sense 2 Demo Board as an experimental
platform, the microcontroller can be reprogrammed through a standard interface. A
six-pin header is provided for connecting the demo board to any MPLAB ICD 2
compatible programmer. Since the ICD interface shares some input lines with the
numeric keypad interface, a separate switch (S13, not shown in the figure) allows users
to connect or disconnect the ICD lines from the scan lines. While this is not strictly
necessary, it does help to reduce the overall capacitance of the touch pads.
Figure 4-3 identifies the key hardware components for the demo board. Note that the
active components are mounted to the bottom side of the board; only the touch sensors
are on the front side.
TOUCH SENSE 2 DEMO BOARD COMPONENT LAYOUT (BOTTOM SIDE)
9
1
2
Component
8
3
Demo Board Hardware
4
BUS
by Q1, an MCP1702 voltage
7
6
DS51748A-page 21
5