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Microprocessor PCB Design

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Microprocessor PCB Design by: Tuan Hung Huynh April 3, 2006 Outline Background Design Process Application Results Purpose Designing computer circuits and software for ... – PowerPoint PPT presentation

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Title: Microprocessor PCB Design


1
Microprocessor PCB Design
  • by
  • Tuan Hung Huynh
  • April 3, 2006

2
Outline
  • Background
  • Design Process
  • Application
  • Results

3
Purpose
  • Designing computer circuits and software for the
    Microprocessor class.
  • PCB layout software
  • Documentation

4
Background
5
Past Designs
  • People to mention
  • Wi Sugiri (projects)
  • Dan Sossaman (board)
  • Neil Clukode
  • Matt Olson
  • Tuan Huynh
  • Chris Carpenter

6
Microcontroller
  • Microcontroller or Microprocessor?
  • Microcontroller basic
  • Microprocessor - complex
  • Atmel and Intel 8051 core architecture
  • AT89S8252 (8052)
  • AT89S8253 (8053)

7
Design Process
8
Structure
  • Developing the schematic layout
  • Updating and improvements
  • Ordering of components
  • Developing software
  • Transforming into a workable circuit
  • Testing and demonstration
  • Optional manufacture of the PCB

9
Protel
  • Schematic Layout

10
Protel
  • Schematic and PCB Libraries
  • Custom components
  • Link of files

PCB library
Schematic library
11
Protel
  • PCB Layout
  • Physical representation

12
Protel
  • Design Rule Check (DRC)
  • Short Circuits
  • Broken Nets
  • Height and Width Constraints
  • Hole Size
  • Clearance Constraints

13
Protel
  • Assembly Files
  • Gerber Files
  • NC Drill Files

.GTL Top Layer
.GBL Bottom Layer
.GTO Top Overlay
.GBO Bottom Overlay
.GTS Top Soldermask
.GBS Bottom Soldermask
.GKO Keep-out Layer
.apr Drill Files
.drr Drill Files
.drl Drill Files
14
Assembly Files
  • Top Silkscreen

15
Assembly Files
  • Top and Bottom Copper

16
Assembly Files
  • Top Soldermask and Bottom Soldermask

17
Assembly Files
  • Drill File

18
Creation of the PCB
  • Board Manufacture
  • Advanced Circuits
  • www.4PCB.com
  • www.FreeDFM.com
  • Component Vendors
  • Digikey
  • All Electronics

19
Application
20
Microprocessor Projects
  • Microprocessor Design class
  • Digital Metronome
  • T-Bird Taillights
  • Digital Clock
  • Serial Communication
  • Memory Mapped Input/Output
  • 7-Segment Displays
  • Keypad Input
  • LCD Display

21
Microprocessor Projects
  • Digital Metronome
  • T-Bird Taillights
  • Digital Clock
  • Port 3

22
Microprocessor Projects
  • Serial Communications
  • Hyper-terminal
  • RS232 buffer chip
  • Serial cable

23
Microprocessor Projects
  • Serial Communications Cable
  • DB9 to RJ45

24
Microprocessor Projects
  • Memory Mapped Input/Output
  • Data latch

25
Microprocessor Projects
  • 7-Segement Displays
  • Data latch
  • Programmable logic device
  • FETs

26
Microprocessor Projects
  • Keypad
  • Data latch
  • PLD

27
Microprocessor Projects
  • Liquid Crystal Display
  • Data latch
  • PLD

28
Problems Encountered
  • Issues with new microcontrollers
  • Chip burners
  • Capacitance
  • Internal Fuse Bits
  • In-System-Programming Circuit

29
In-System-Programming
  • Modification of the board is possible
  • Buffer chip
  • Programmable logic device
  • Re-wire

30
In-System-Programming
  • ISP Cable
  • DB25 to RJ45

31
Results
32
Completion
  • Board applied in the classroom
  • Update from previous designs
  • Capable of future updates

33
Future Design
  • Reduction of Components
  • Dual Microcontrollers
  • USB
  • Surface Mount Components

34
Questions
35
References
  • Marcus O. Durham, PhD. Systems Design and the
    8051. Second Edition. TechnoPress. Tulsa, OK.
    2003 2004.
  • Altium Protel
  • http//www.4pcb.com
  • http//www.allelectronics.com
  • http//www.play-hookey.com/digital/experiments
  • /seven_seg_led.html
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