Picaxe

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Picaxe

  1. 1. <ul><li>PIC microcontrollers </li></ul>
  2. 2. <ul><li>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 . </li></ul>
  3. 3. <ul><li>8 and 16 bit EEPROM/EPROM/ROM CMOS Microcontroller </li></ul><ul><li>Applications in personal care, security systems, remote transmitter/receivers </li></ul><ul><li>Programmable input/output terminations </li></ul>
  4. 4. <ul><li>This block diagram shows a PIC microcontroller application in a vacuum cleaner </li></ul>http://www.microchip.com
  5. 5. <ul><li>Microchip’s Infrared products enable the embedded system designer to easily add infrared wireless connectivity </li></ul>http://www.microchip.com
  6. 7. Internal view of a microcontroller
  7. 8. <ul><li>PIC development boards are used to program and run simple programs </li></ul><ul><li>Serial PC interface to </li></ul><ul><li>program IC </li></ul><ul><li>Some small PICs though powerful have only 35 instructions that control its operation . </li></ul>
  8. 9. <ul><li>PROGRAM DEVELOPMENT TOOLS </li></ul><ul><li>Icon Assembler (CoreChart) Simple Flowchart </li></ul>
  9. 10. Pin Description for PIC12C508A <ul><li>GP0 </li></ul><ul><li>Bi-directional I/O port/ serial programming data mode. </li></ul><ul><li>GP1 </li></ul><ul><li>Bi-directional I/O port/ serial programming clock. </li></ul><ul><li>GP2/T0CKI </li></ul><ul><li>I/O Bi-directional I/O port. Can be configured as T0CKI. </li></ul><ul><li>GP3/MCLR/VPP </li></ul><ul><li>Input port/master clear (reset) input/programming voltage input. </li></ul><ul><li>GP4/OSC2 </li></ul><ul><li>I/O Bi-directional I/O port/oscillator crystal output. </li></ul><ul><li>GP5/OSC1/CLKIN </li></ul><ul><li>Bidirectional IO port/oscillator crystal input/external clock source input </li></ul><ul><li>VDD— Positive supply for logic and I/O pins </li></ul><ul><li>VSS— Ground reference for logic and I/O pins </li></ul>
  10. 11. 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).
  11. 12. <ul><li>It is much easier to learn and debug than industrial </li></ul><ul><li>programming languages. </li></ul><ul><li>PICAXE programming is at the ‘chip’ level. </li></ul><ul><li>The microcontroller is programmed via a 3-wire </li></ul><ul><li>connection to the computers serial port. </li></ul>THE PICAXE MICRO CONTROLLER
  12. 13. <ul><li>Has an internal A to D converter enabling analogue </li></ul><ul><li>inputs with digital outputs. </li></ul>THE PICAXE MICRO CONTROLLER

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