PIC16F84A - 18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller
and details for each pin.
FIGURE 1-1: PIC16F84A BLOCK DIAGRAM FLASH Program Memory 1K x 14 13 Program Counter 8 Level Stack (13-bit) Program Bus 14 Instruction Register 5 Direct Addr Data Bus 8 RAM File Registers 68 x 8 7 RAM Addr Addr Mux 7 Indirect Addr FSR reg STATUS reg 8 EEPROM Data M
PIC16F84A Features
* 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
