Microcontroller Tradeoff Analysis

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Microcontroller Trade-off Analysis

• Carol Reiley
• Haptics

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Products

• MicroController programmed in assembly or high
  level such as basic or C.
• Paralax basic stamp
• Microchip Pic Microcontroller
• Atmel's AVR microcontrollers
• Six different models
• System on a chip
• Personal Computer Examples include an IBM PC
  compatible or an Apple Mac
• Single-Board computer Programmed in high level
  language or assembly. Offer more processing
  power than microcontroller.

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Microcontroller

• Inexpensive and have simple power requirements
  (usually 5V)
• Infield programming and reprogramming

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System on a Chip

• Pro
• Flexible
• High capabilities

• Con
• New to the lab
• No advanced or experienced users
• Hard to learn
• Uncertain when we will receive them

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Personal Computers

• Qualities to look for if you plan to use PC as
  brains in a no tethered robot.
• Small size
• Standard power supply requirements
• Accessibility to microprocessor system bus or an
  input/output port
• Uni/bidirectional parallel port
• Programmability
• Mass storage capability
• Availability of technical details

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Single board Computers

• Like junior PCs on a single circuit board

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Microcontrollers

• Basic Stamp
• Pic
• Atmel AVR 8 bit RISC

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Paralax Basic Stamp

• Pro
• Easy to learn
• Multithreaded
• Flexible
• -can expand

• Con
• Relatively slower
• Limited
• Cant handle buffers
• More expensive (60-70)
• Great documentation and support

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Microchip Pic Microcontroller

• Pro
• 20 MHZ
• 4 CPI
• Price(5-10)
• ADC included
• Flexible

• Con
• 10W programming space
• -8Kb program ROM
• Memory page (4 sections)
• Also limited
• Have to pay for compiler
• - buggy

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Atmel ATmega series

• Price 12-16
• Free compilers
• Support libraries

• Harder to use (not as documented)
• Written in C so hard for incoming seniors
  continuing project

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Atmel Omega Series

• 8 bit RISC Models Analyzed have a RISC core
  running single cycle instructions and a
  well-defined I/O structure that limits the need
  for external components. Internal oscillators,
  timers, UART, SPI, pull-up resistors, pulse width
  modulation, ADC, analog comparator and watch-dog
  timers. AVR instructions are tuned to decrease
  the size of the program whether the code is
  written in C or Assembly. With on-chip in-system
  programmable Flash and EEPROM, the AVR is a
  perfect choice
• 128
• 32
• 16

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128

• 128-Kbyte self-programming Flash Program Memory,
  4-Kbyte SRAM, 4-Kbyte EEPROM, 8 Channel 10-bit
  A/D-converter. JTAG interface for on-chip-debug.
  Up to 16 MIPS throughput at 16 Mhz.

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32

• 32-Kbyte self-programming Flash Program Memory,
  2-Kbyte SRAM, 1-Kbyte EEPROM, 8 Channel 10-bit
  A/D-converter. JTAG interface for on-chip-debug.
  Up to 16 MIPS throughput at 16 Mhz.

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16

• 16-Kbyte self-programming Flash Program Memory,
  1-Kbyte SRAM, 512 Byte EEPROM, 8 Channel 10-bit
  A/D-converter. JTAG interface for on-chip-debug.
  Up to 16 MIPS throughput at 16 Mhz.