Техническая Спецификация для Microchip Technology DM240015
Introduction to the Starter Kit
2013 Microchip Technology Inc.
DS50002172A-page 15
1.
PICkit On Board (PKOB) USB Programmer/Debugger and Connector
The PKOB is used to program the PIC24FJ128GC010 MCU on the Starter Kit. It con-
nects via USB to MPLAB X, Microchip’s programming and debugging environment,
and eliminates the need for an external hardware programmer. For more information
on loading your own application into the Starter Kit (or reloading the original
application), see
nects via USB to MPLAB X, Microchip’s programming and debugging environment,
and eliminates the need for an external hardware programmer. For more information
on loading your own application into the Starter Kit (or reloading the original
application), see
.
2.
LCD Display
This is a custom passive display panel developed exclusively for Microchip Technology.
The panel is an STN, positive-sense LCD, organized as a 36-segment by 8-column
display. It includes a 37 x 8 dot-matrix array for alphanumeric or special characters and
17 special purpose display icons (useful for many consumer applications) composed
of 29 addressable elements.
The LCD panel is directly driven from the I/O pins of the PIC24FJ128GC010 micro-
controller; a separate display controller is not required. Multiplexing of the display
elements is described in
The panel is an STN, positive-sense LCD, organized as a 36-segment by 8-column
display. It includes a 37 x 8 dot-matrix array for alphanumeric or special characters and
17 special purpose display icons (useful for many consumer applications) composed
of 29 addressable elements.
The LCD panel is directly driven from the I/O pins of the PIC24FJ128GC010 micro-
controller; a separate display controller is not required. Multiplexing of the display
elements is described in
3.
mTouch Navigation Touch Pads
These three navigation buttons are designed into the PCB itself and are configured to
respond to the user’s body capacitance when touched. Control of the touch sense
features are built on the PIC24F microcontroller’s on-chip Charge Time Measurement
Unit (CTMU) module, which uses a constant-current source to detect changes in the
pad’s capacitance. A more detailed description of the CTMU module’s operation is
provided in the “PIC24F Family Reference Manual”, “Charge Time Measurement
Unit (CTMU)”
respond to the user’s body capacitance when touched. Control of the touch sense
features are built on the PIC24F microcontroller’s on-chip Charge Time Measurement
Unit (CTMU) module, which uses a constant-current source to detect changes in the
pad’s capacitance. A more detailed description of the CTMU module’s operation is
provided in the “PIC24F Family Reference Manual”, “Charge Time Measurement
Unit (CTMU)”
(DS39724). Additional information on the mTouch system is available at
The buttons are covered in detail in
4.
SW1 Momentary Push Button
This is normally an open SPST push button connected to port pin, RD0. Pressing this but-
ton brings RD0 to logic low (ground). The demo application uses this switch to toggle
Sleep mode, as described in
ton brings RD0 to logic low (ground). The demo application uses this switch to toggle
Sleep mode, as described in
5.
User LEDs
These two red LEDs are tied to port pins. D1 is tied to RE7 and D2 is tied to RB6. A logical
‘1’ on the port pin will light the corresponding LED. When on, each draws 1 mA of current.
‘1’ on the port pin will light the corresponding LED. When on, each draws 1 mA of current.
6.
Potentiometer (R7)
This 10 kΩ trim potentiometer is connected to the analog input pin, AN19. It is config-
ured as a voltage divider between SWITCHED_VDD and ground. See
ured as a voltage divider between SWITCHED_VDD and ground. See
for more information.
7.
USB Host and Device Connectors (J2 and J3)
Connectors, J2 (USB-A) and J3 (USB mini-B), allow the Starter Kit board to provide
USB host and device functionality. These two USB connectors share the micro-
controller’s single USB port; therefore, only one device can be connected at a time. The
preprogrammed application is configured for device functionality only.
When the board is connected through J2, V
USB host and device functionality. These two USB connectors share the micro-
controller’s single USB port; therefore, only one device can be connected at a time. The
preprogrammed application is configured for device functionality only.
When the board is connected through J2, V
BUS
is used to power the
PIC24FJ128GC010 microcontroller (both V
DD
and SWITCHED_VDD). LED D4 lights
when V
BUS
is detected. The PKOB is not powered.
8.
MCLR Push Button (S2)
Pressing the switch pulls the MCLR pin low, causing a Reset for the microcontroller and
any application that may be running.
any application that may be running.