seminar on PIC1684
Download as PPTX, PDF•1 like•1,405 views
The document is a seminar guide on PIC microcontrollers presented by Sagar S. Sarvade at Basaveshwar Engineering College, covering definitions, features, architecture, and advantages of the PIC16F84 model. Key details include its CPU design, memory architecture, and the instruction set comprising 35 instructions. The seminar emphasizes the ease of programming and applications in both industrial and educational settings.
seminar on PIC1684
- 1. Basaveshwar Engineering College (Autonomous), Bagalkot. Department of Instrumentation Technology “PIC Microcontroller” Seminar Guide : Prof. Santosh B. K. Presented by: Sagar S. Sarvade USN: 2BA09IT015 Roll: 12 12/18/2012 1
- 2. Content • What is microcontroller? • PIC microcontrollers • Features of PIC16F84 • Architecture of PIC16F84 1. CPU 2. status register 3. memory • INTCON register • Instruction set • Advantages & limitations 12/18/2012 2
- 3. What is a microcontroller? • It is a computer on a single chip. • A single chip contain processor, RAM & ROM memory, clock, & I/O control unit. • It is also called as “system on chip”. • Microcontrollers are designed for embedded applications. 12/18/2012 3
- 4. PIC Microcontrollers • Peripheral Interface Controller(PIC) is a family of microcontrollers by Microchip Technology. • Harvard architecture. • 3 types: a. 12-bit instruction word MCU b. 14-bit instruction word MCU c. 16-bit instruction word MCU 12/18/2012 4
- 5. Features of PIC16F84: • 14-bit instruction word • 18 pin device • 13 I/O pins • 68 bytes of RAM • 1k word of program ROM • 64 bytes of EEPROM • One 8-bit timer • One watchdog timer 12/18/2012 5
- 7. CPU: • It has instruction decoder, ALU, control unit. • It has only one accumulator, called as working register. • Supports RISC architecture. • Has 35 simple instructions. • Execution time is very less.(approx. 0.2µs) 12/18/2012 7
- 8. Status register: • RPO: register bank select • TO: watchdog timer time-out bit • PD: power down bit • z: zero bit • DC: digital carry bit • C: carry bit 12/18/2012 8
- 9. Memory: Program memory: • 13-bit program counter • 8 stack level of 13-bit • Reset vector & peripheral interrupt vector. • Only 1k memory is implemented. • Remaining is left unimplemented 12/18/2012 9
- 10. Data memory: • 2 register banks • Bank is selected by bit-5 of status register. • 68 bytes for general purpose 12/18/2012 10
- 11. INTCON register: • GIE: global interrupt enable • EEIE: EE write complete interrupt • TOIE: TMRO timer overflow interrupt • INTE: INT external interrupt • RBIE: RB port change interrupt • TOIF: TMRO overflow flag • INTF: external interrupt flag • RBIF: RB port change interrupt flag 12/18/2012 11
- 12. Instruction set: • Only 35 instructions. • 3 types of instructions: 1. Byte-oriented Ex: a) addwf f,d, b)andwf f,d. etc.. 2. Bit-oriented Ex: a)bcf f, b, b)bsf f, b. etc.. 3. Literal & control operations Ex: a)addlw k, b)andlw k etc.. 12/18/2012 12
- 13. Advantages: Limitations: • Easy to learn • Only one working • Fast execution due register. to RISC architecture. • Register bank • Inexpensive switching required to • Wide range of access entire RAM. interfaces including USB, USART. 12/18/2012 13
- 14. Conclusion: • Thus PIC microcontrollers are easier to program for interfacing, & has Fast response. • PIC microcontrollers can be used for industrial purpose. • small and inexpensive PIC microcontrollers can be used for hobby and educational purpose. 12/18/2012 14
- 15. References: • PIC microcontrollers by Elsevier, edition 2008 • The Quintessential PIC Microcontroller by Sid Katzen • www.microchip.com • www.slideshare.com 12/18/2012 15
- 16. Thank you…. 12/18/2012 16
- 17. Any queries??? 12/18/2012 17