PIC 16F84A

18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller• Only 35 single word instructions to learn• All instructions single cycle except for programbranches 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 interrupt on change– Data EEPROM write complete