DM180021 Microchip Technology Inc., DM180021 Datasheet - Page 31

• Manufacturer Part Number: DM180021
• Description: MPLAB Starter Kit for PIC18F MCU
• Manufacturer: Microchip Technology Inc.

Specifications of DM180021

• Contents: MicroSD™ memory cardAcceleration sensorOLED display
• Lead Free Status / Rohs Status: RoHS Compliant part

© 2009 Microchip Technology Inc.
A4. BMA150 Acceleration Sensor (U6): This device implements a complete 3-axis
A5. Capacitive Touch Pads (S1): This 5-element keypad is an integral part of the
A6. mini-B USB Receptacle (J5): Physically identical to J1, this provides USB
A7. Potentiometer (R24): Provides a variable analog input to the microcontroller for
A8. Bootloader Reset Push Button (S1): The switch provides a hardware signal
A9. OLED Voltage Boost Circuitry: L3, D5 and Q4 (along with other passive
A10. Soft Start Circuit: Transistor Q1 and its associated passive components form a
A11. MCP1727 Voltage Regulator (U5): The 3.3V linear regulator regulates the USB
accelerometer and temperature sensor solution in an 8-lead QFN package. The
accelerometer is a semiconductor-based strain gauge with no moving parts and
never requires calibration. All acceleration and temperature data is provided in
real time in digital format, compatible with standard SPI interfaces.
board’s top layer. The application responds to capacitive changes induced by
direct contact with the user by monitoring each of the touch pad’s elements with
the microcontroller’s integrated CTMU module.
connectivity for the application side when it is functioning as a peripheral device.
certain demo applications.
interpreted by the main application that is used to reset the application and
invoke the MicroSD bootloader.
components) are connected in a voltage boost topology. This provides the
OLED display with its nominal operating voltage of 13 V
PWM controlled regulator. This is used to keep the non-microcontroller portions
of the application within the Inrush and Suspend Current limitations spelled out in
the USB specification. See Appendix B. “USB Current Draw Requirements”
for more information.
unregulated voltage to 3.3 volts (with respect to V
with system power.
SS
) and supplies the starter kit
DC
.
Hardware
DS51852A-page 27