PIC 16F84A

18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller

• Only 35 single word instructions to learn
• All instructions single cycle except for program
branches which are two-cycle
• Operating speed: DC – 20 MHz clock input
DC – 200 ns instruction cycle
• 1024 words of program memory
• 68 bytes of data RAM
• 64 bytes of data EEPROM
• 14-bit wide instruction words
• 8-bit wide data bytes
• 15 special function hardware registers
• Eight-level deep hardware stack
• Direct, indirect and relative addressing modes
• Four interrupt sources:
– External RB0/INT pin
– TMR0 timer overflow
– PORTB<7:4> interrupt on change
– Data EEPROM write complete