Features:

• 18-pin packaging
• Baseline Core with 33 Instructions, 2 Stack Levels
• All single-cycle Instructions except for program branches which are two cycles
• 12-bit wide instructions
• 8-bit wide data path
• 25 mA source/sink current I/O
• Low power (100nA) sleep current
• One 8-bit timer (TMR0)
• Watchdog timer (WDT)
• In-Circuit Serial Programming™
• In-Circuit debugging support
• Programmable code protection

Specifications:

• Only 33 single-word instructions to learn
• All instructions are single-cycle except for program branches which are two-cycle
• Two-level deep hardware stack
• Direct, Indirect and Relative Addressing modes for data and instructions
• Operating speed:
  • DC – 20 MHz clock speed
  • DC – 200 ns instruction cycle time
• On-chip Flash Program Memory:
  • 512 x 12 on PIC16F54
  • General Purpose Registers (SRAM): - 25 x 8 on PIC16F54

  Datasheet