
PIC16F84A

18-pin Enhanced FLASH/EEPROM 8-Bit Microcontroller

High Performance RISC CPU 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
• 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

Peripheral Features:

• 13 I/O pins with individual direction control
• High current sink/source for direct LED drive
  - 25 mA sink max. per pin
  - 25 mA source max. per pin
• TMR0: 8-bit timer/counter with 8-bit
  programmable prescaler

Special Microcontroller Features:

• 10,000 erase/write cycles Enhanced FLASH
  Program memory typical
• 10,000,000 typical erase/write cycles EEPROM
  Data memory typical
• EEPROM Data Retention > 40 years
• In-Circuit Serial Programming™ (ICSP™) - via
  two pins
• Power-on Reset (POR), Power-up Timer (PWRT),
  Oscillator Start-up Timer (OST)
• Watchdog Timer (WDT) with its own On-Chip RC
  Oscillator for reliable operation
• Code protection
• Power saving SLEEP mode
• Selectable oscillator options

CMOS Enhanced FLASH/EEPROM Technology:

• Low power, high speed technology
• Fully static design
• Wide operating voltage range:
  - Commercial: 2.0V to 5.5V
  - Industrial: 2.0V to 5.5V
• Low power consumption:
  - < 2 mA typical @ 5V, 4 MHz
  - 15 mA typical @ 2V, 32 kHz
  - < 0.5 mA typical standby current @ 2V
