High-Performance RISC CPU:
• C Compiler Optimized Architecture
• Only 49 Instructions
• Operating Speed:
    - DC – 20 MHz clock input
    - DC – 200 ns instruction cycle
• Interrupt Capability with Automatic Context Saving
• 16-Level Deep Hardware Stack with Optional Overflow/Underflow Reset
• Direct, Indirect and Relative Addressing modes:
    - Two full 16-bit File Select Registers (FSRs)
    - FSRs can read program and data memory

Flexible Oscillator Structure:
• 16 MHz Internal Oscillator Block:
    - Factory calibrated to ±1%, typical
    - Software selectable frequency range from 16 MHz to 31 kHz
• 31 kHz Low-Power Internal Oscillator
• Three External Clock modes up to 20 MHz

Special Microcontroller Features:
• Operating Voltage Range:
    - 1.8V to 3.6V (PIC16LF1503)
    - 2.3V to 5.5V (PIC16F1503)
• Self-Programmable under Software Control
• Power-on Reset (POR)
• Power-up Timer (PWRT)
• Programmable Low-Power Brown-out Reset (LPBOR)
• Extended Watchdog Timer (WDT):
    - Programmable period from 1 ms to 256s
• Programmable Code Protection
• In-Circuit Serial Programming™ (ICSP™) via Two Pins
• Enhanced Low-Voltage Programming (LVP)
• In-Circuit Debug (ICD) via Two Pins
• Power-Saving Sleep mode:
    - Low-Power Sleep mode
    - Low-Power BOR (LPBOR)
• Integrated Temperature Indicator
• 128 Bytes High-Endurance Flash
    - 100,000 write Flash endurance (minimum)

Memory:
• 2 Kwords Linear Program Memory Addressing
• 128 bytes Linear Data Memory Addressing
• High-Endurance Flash Data Memory (HEF)
    - 128 bytes if nonvolatile data storage
    - 100k erase/write cycles

eXtreme Low-Power (XLP) Features (PIC16LF1503):
• Sleep Current:
    - 20 nA @ 1.8V, typical
• Watchdog Timer Current:
    - 260 nA @ 1.8V, typical
• Operating Current:
    - 30 μA/MHz @ 1.8V, typical
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