PIC microcontrollers

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• PIC microcontrollers

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• PIC microcontrollers come in a wide range of
  packages from small chips with only 8 pins and
  512 words of memory all the way up to very
  powerful devices that have 32 Kilo words of
  memory and 84 pins to connect to electronic
  circuits.

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• 8 and 16 bit EEPROM/EPROM/ROM CMOS
  Microcontroller
• Applications in personal care, security systems,
  remote transmitter/receivers
• Programmable input/output terminations

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• This block diagram shows a PIC microcontroller
  application in a vacuum cleaner

http//www.microchip.com
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• Microchips Infrared products enable the embedded
  system designer to easily add infrared wireless
  connectivity

http//www.microchip.com
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Internal view of a microcontroller
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• PIC development boards are used to program and
  run simple programs
• Serial PC interface to
• program IC
• Some small PICs though powerful have only 35
  instructions that control its operation.

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• PROGRAM DEVELOPMENT TOOLS
• Icon Assembler (CoreChart)
  Simple Flowchart

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Pin Description for PIC12C508A

• GP0
• Bi-directional I/O port/ serial programming data
  mode.
• GP1
• Bi-directional I/O port/ serial programming
  clock.
• GP2/T0CKI
• I/O Bi-directional I/O port. Can be configured as
  T0CKI.
• GP3/MCLR/VPP
• Input port/master clear (reset) input/programming
  voltage input.
• GP4/OSC2
• I/O Bi-directional I/O port/oscillator crystal
  output.
• GP5/OSC1/CLKIN
• Bidirectional IO port/oscillator crystal
  input/external clock source input

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THE PICAXE MICRO CONTROLLER
The PICAXE is a low-cost FLASH memory based
microcontroller. These microcontrollers can be
programmed over and over again (typically 100
000 times). The PICAXE uses a simple BASIC
language (or graphical flowcharts).
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THE PICAXE MICRO CONTROLLER

• It is much easier to learn and debug than
  industrial
• programming languages.
• PICAXE programming is at the chip level.
• The microcontroller is programmed via a 3-wire
• connection to the computers serial port.

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THE PICAXE MICRO CONTROLLER

• Has an internal A to D converter enabling
  analogue
• inputs with digital outputs.