User`s guide

Hardware

4.3.1 Debug Components

The following components support the debug function of the starter kit. See Appendix

A. “Schematics” for debug schematics.

4.3.1.1 MINI-B USB CONNECTOR (J1)

Provides system power and bidirectional communication between the host PC and

starter kit.

4.3.1.2 MCP1727 (U1)

3.3V Linear regulator. Regulates the USB unregulated voltage to 3.3 volts (with respect

to V

SS) and supplies the starter kit with system power.

4.3.1.3 STATUS LED – DEBUG (D2)

When lit, indicates that communication between the starter kit and MPLAB IDE has

been successfully established.

4.3.1.4 STATUS LED – SYSTEM POWER (D1)

When lit, indicates that the starter kit is powered via the USB.

4.3.1.5 PIC18F67J50 MCU (U2)

Controls the programming/debugging operations of the target dsPIC33FJ256GP506

digital signal controller.

4.3.1.6 LOW Vce SATURATION PNP TRANSISTOR SWITCH (Q1)

Provides target power (via high-side switching) to the dsPIC33FJ256GP506 (and

ancillary circuitry) via control by the PIC18F67J50 programming/debugging MCU.

4.3.1.7 25LC010A SERIAL EEPROM (U3)

Provides nonvolatile parameter storage for the PIC18F67J50 MCU.

4.3.2 Audio Components

The following components support the audio portion of the starter kit. See Appendix

A. “Schematics” for audio schematics.

4.3.2.1 FLASH MEMORY (U5)

The starter kit includes a serial Flash memory chip (Ref A1). The power supply for U5

is provided by regulator U4. The regulator provides the required amount of current for

flash programming operation.

4.3.2.2 DIGITAL SIGNAL CONTROL (U6)

The dsPIC33F256GP506 digital signal controller (Ref A2) provides the computation

and processing resource for application development on the starter kit. This DSC

features 256 KB of program flash and 16 KB RAM. The application can either use the

on-chip FRC or the external 12 MHz signal as clock source.

4.3.2.3 TEMPERATURE SENSOR (U7)

The starter kit includes a temperature sensor (Ref A3) that interfaces to the ADC

module on the dsPIC33F device. The temperature sensor is a Microchip TC1047.