ECE3120: Microcomputer Systems

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ECE3120 Microcomputer Systems

• Dr. Xubin He
• http//iweb.tntech.edu/hexb
• Email hexb_at_tntech.edu
• Tel [phone], Brown Hall 319

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Course Review

• HCS12 overview Chapters 1 ,3
• Computer organization HW, SW
• Memory Addressing
• Instruction queue and execution cycle
• HCS12 members
• Dragon12 demo boards
• D-Bug12
• HCS12 Programming Chapters 2, 4
• Basic programming program structure, directives,
  arithmetic, loops, branch, shift/rotate, boolean
  logic, bit test
• Advanced programming stack, array, strings,
  stack frames, subroutines, using D-bug12 to
  perform I/O
• Parallel Ports Chapter 7
• Concepts, I/O addressing and synchronization,
  HCS12 parallel ports overview
• Interfacing with input devices LEDs, 7-segment,
  LCDs
• Interfacing with input devices keypad, switch
  scanning, debouncing, ASCII code lookup
• D/A converter
• Interrupts Chapter 6
• General interrupt concepts
• HCS12 exceptions reset, interrupt (nonmaskable,
  maskable) priority, ISR, IVT
• HCS12 operaion modes normal, special

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Computer Organization

• Computer
• Hardware
• Processor brain, CPU
• Datapath registers and ALU
• Control unit hardware instrucion logic.
• Memory place to store software programs and data
• I/O devices enter data/programs into the
  computer/display outputs
• Software programs
• A program is a set of instructions that the
  computer hardware can execute.

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Computer Organization
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Memory Map
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CPU Registers
I/O Registers Appendix C
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Addressing Modes
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Addressing Modes (Contd).
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Indexed Addressing Modes