DEVICE OVERVIEW
The PIC16(L)F1503 are described within this data sheet. They are available in 14 pin packages. Figure 1-1 shows a block diagram of the PIC16(L)F1503 devices

High-Performance RISC CPU:
• C Compiler Optimized Architecture
• Only 49 Instructions
• 3.5 Kbytes Linear Program Memory Addressing
• 128 bytes Linear Data Memory Addressing
• 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)
• Power-Saving Sleep mode:
   - Low-Power Sleep mode
   - Low-Power BOR (LPBOR)
• Integrated Temperature Indicator

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

Peripheral Features:
• Analog-to-Digital Converter (ADC):
   - 10-bit resolution
   - 8 external channels
   - 2 internal channels:
   - Fixed Voltage Reference and DAC channels
   - Temperature Indicator channel
   - Auto acquisition capability
   - Conversion available during Sleep
• 2 Comparators:
   - Rail-to-rail inputs
   - Power mode control
   - Software controllable hysteresis
• Voltage Reference module:
   - Fixed Voltage Reference (FVR) with 1.024V, 2.048V and 4.096V output levels
   - 1 rail-to-rail resistive 5-bit DAC with positive reference selection
• 12 I/O Pins (1 Input-only Pin):
   - High current sink/source 25 mA/25 mA
   - Individually programmable weak pull-ups
   - Individually programmable inter rupt-on-change (IOC) pins
• Timer0: 8-Bit Timer/Counter with 8-Bit Programmable Prescaler
• Enhanced Timer1:
   - 16-bit timer/counter with prescaler
   - External Gate Input mode
• Timer2: 8-Bit Timer/Counter with 8-Bit Period Register, Prescaler and Postscaler
• Four 10-bit PWM modules
• Master Synchronous Serial Port (MSSP) with SPI and I2C™ with:
   - 7-bit address masking
   - SMBus/PMBus™ compatibility
• 2 Configurable Logic Cell (CLC) modules:
   - 16 selectable input source signals
   - Four inputs per module
   - Software control of combinational/sequential logic/state/clock functions
   - AND/OR/XOR/D Flop/D Latch/SR/JK
   - External or internal inputs/outputs
   - Operation while in Sleep
  
• Numerically Controlled Oscillator (NCO):
   - 20-bit accumulator
   - 16-bit increment
   - True linear frequency control
   - High-speed clock input
   - Selectable Output modes
   - Fixed Duty Cycle (FDC)
   - Pulse Frequency Mode (PFM)
• Complementary Waveform Generator (CWG):
   - 8 selectable signal sources
   - Selectable falling and rising edge dead-band control
   - Polarity control
   - 4 auto-shutdown sources
   - Multiple input sources: PWM, CLC, NCO