ece 477 group 13 beethoven s ear preliminary schematic and hardware design
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ECE 477 Group 13 Beethoven’s Ear Preliminary Schematic and Hardware Design. David Duemler Martin Pendergast Nick Kwolek Stephen Edwards. Overview. Updated Block Diagram Schematic Considerations. Block Diagram. GPIO x14. Schematic Considerations.

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ece 477 group 13 beethoven s ear preliminary schematic and hardware design

ECE 477 Group 13Beethoven’s EarPreliminary Schematic and Hardware Design

David Duemler Martin Pendergast

Nick Kwolek Stephen Edwards

overview
Overview
  • Updated Block Diagram
  • Schematic Considerations
schematic considerations
Schematic Considerations
  • Want to isolate analog signal (unconverted audio) from power and various digital signals
  • Can assign various peripherals on the PIC24 and dsPIC to pins (Peripheral Pin Select)
  • Need 5V to power ADC, amplifier, filter, LCD
  • Need 3.3V to power dsPIC, PIC24
  • Want 4.2V for LCD backlight (use 5V with resistor)
dsp connections
DSP Connections
  • 2 SPI
    • ADC
    • PIC24
  • Programming header
pic24 connections
PIC24 Connections
  • 2 SPI
    • DSP
    • SD Card
  • 21 GPIO
    • 14 for LCD interface
    • 2 for RPG
    • 2 for buttons
    • 3 for LEDs
  • Programming header
other considerations
Other Considerations
  • Want headers on SPI lines for debugging
  • Need headers to connect buttons, RPG, LEDs, LCD to board
  • Because peripherals can be mapped to pins, want to choose pins to minimize size
    • Possible conflict with attempt to isolate analog signals
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