Intrerfacing i
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This document provides an overview and agenda for interfacing with the PIC16F877A microcontroller. It discusses the microcontroller's pins and ports, including PORTA-PORTE. It describes the minimum hardware needed and some example input and output devices like LEDs, buttons, and sensors. It then outlines 4 projects involving flashing LEDs, toggling an LED with a button press, and turning on a 220V lamp with a button. The document provides information on timers, analog to digital conversion, communication protocols, and other features of the PIC16F877A.
Intrerfacing i
- 2. Agenda • ‘PIC16F877A’ Overview • ‘PIC16F877A’ Pins & Ports • Minimum Hardware • Input & Output Devices • Project 1 “Flasher-1” • Project 2 “Flasher-2” • Pull-Up & Pull-Down Resistor • Project 3 “Button-1” • Project 4 “High-Volt”
- 3. ‘PIC16F877A Overview • Operating Speed : 20 MHz clock input • 3 Timers ( 1 * 16 bit --- 2 * 8 bit) • 2 CCP Modules • 8- channel , 10-Bit Analog to digital Converter (ADC) • Synchronous Serial Port ( SPI & I2C) • Universal Synchronous Asynchronous Receiver/Transmitter (USART) • 100,000 Erase/Write cycle Enhanced Flash • 1000,000 Erase/Write cycle EEPROM • In-Circuit Serial Programmer (ICSP)
- 4. ‘PIC16F877A’ Pins & Ports
- 5. ‘PIC16F877A Ports : PORTA • RA0 , RA1 : Digital I/O , Analog input • RA2 : Digital I/O , Analog input , ADC Ref- , Comparator Ref • RA3 : Digital I/O , Analog input , ADC Ref+ • RA4 : Digital I/O , Comparator 1 output • RA5 : Digital I/O , Analog input , SPI salve select , Comparator 2 output PORTA : is a 6-Bit Bidirectional port
- 6. ‘PIC16F877A Ports : PORTB • RB0 : Digital I/O , External Interrupt • RB1 : Digital I/O • RB2 : Digital I/O • RB3 : Digital I/O , Low voltage ICSP programming enable pin • RB4 : Digital I/O • RB5 : Digital I/O • RB6 : Digital I/O , In circuit Debugger & ICSP Programming Clock • RB7 : Digital I/O , In circuit Debugger & ICSP Programming Data PORTB : is an 8-Bit Bidirectional port , with software weak PULL-UP
- 7. ‘PIC16F877A Ports : PORTC • RC0 : Digital I/O , TMR1 Oscillator output , TMR1 external clock input • RC1 : Digital I/O , TMR1 Oscillator input , Capture2 input , compare2 , PWM2 • RC2 : Digital I/O , Capture 1 input , Comparator 1 output , PWM 1 output • RC3 : Digital I/O , SPI clock , I2C clock • RC4 : Digital I/O , SPI data in , I2C data I/O • RC5 : Digital I/O , SPI data out • RC6 : Digital I/O , UART transmitter , USART clock • RC7 : Digital I/O , UART receiver , USART Data PORTC : is an 8-Bit Bidirectional port
- 8. ‘PIC16F877A Ports : PORTD • RD0 : Digital I/O , Parallel Slave port bit 0 • RD1 : Digital I/O , Parallel Slave port bit 1 • RD2 : Digital I/O , Parallel Slave port bit 2 • RD3 : Digital I/O , Parallel Slave port bit 3 • RD4 : Digital I/O , Parallel Slave port bit 4 • RD5 : Digital I/O , Parallel Slave port bit 5 • RD6 : Digital I/O , Parallel Slave port bit 6 • RD7 : Digital I/O , Parallel Slave port bit 7 PORTD : is an 8-Bit Bidirectional port
- 9. ‘PIC16F877A Ports : PORTE • RE0 : Digital I/O , Analog input , Read control for parallel slave • RE1 : Digital I/O , Analog input , Write control for parallel slave • RE2 : Digital I/O , Analog input , chip select control for parallel slave PORTE : is a 3-Bit Bidirectional port
- 10. Minimum Hardware
- 11. Input & Output Devices Output Devices : - LEDs - Buzzer - 7-Segment - LCDs Input Devices : - Buttons & Switches - Sensors
- 12. Project-1 “Flasher-1” Make project where a LED is connected to RB0 , This LED is on for half Second and off for another half second .
- 13. Project-2 “Flasher-1” Make project where an 8 LED is connected To PORTB , half LED is on for 0.5s and the other is off and After 0.5s the LED is complemented
- 14. Pull-Up & Pull-Down Resistor
- 15. Project-3 “Button-1” LED is connected to RB0 and button to RD0 When the button is pressed the LED complement Its Status
- 16. Project-4 “High-Volt” 220-Lamp is connected to RB0 and button to RD0 When the button is pressed the Lamp is on for 1s then off.
- 17. Q & A