PIC 18F4520 - DIP40

Special Microcontroller Features: 
• C Compiler Optimized Architecture: 
- Optional extended instruction set designed to optimize re-entrant code 
• 100,000 Erase/Write Cycle Enhanced Flash Program Memory Typical 
• 1,000,000 Erase/Write Cycle Data EEPROM Memory Typical 
• Flash/Data EEPROM Retention: 100 Years Typical 
• Self-Programmable under Software Control 
• Priority Levels for Interrupts 
• 8 x 8 Single-Cycle Hardware Multiplier 
• Extended Watchdog Timer (WDT): - Programmable period from 4 ms to 131s 
• Single-Supply 5V In-Circuit Serial Programming™ (ICSP™) via Two Pins 
• In-Circuit Debug (ICD) via Two Pins 
• Wide Operating Voltage Range: 2.0V to 5.5V 
• Programmable Brown-out Reset (BOR) with Software Enable Option 

Power Management Features: 
• Run: CPU on, Peripherals on 
• Idle: CPU off, Peripherals on 
• Sleep: CPU off, Peripherals off 
• Ultra Low 50nA Input Leakage 
• Run mode Currents Down to 11 µA Typical 
• Idle mode Currents Down to 2.5 µA Typical 
• Sleep mode Current Down to 100 nA Typical 
• Timer1 Oscillator: 900 nA, 32 kHz, 2V 
• Watchdog Timer: 1.4 µA, 2V Typical 
• Two-Speed Oscillator Start-up 

Flexible Oscillator Structure: 
• Four Crystal modes, up to 40 MHz 
• 4x Phase Lock Loop (PLL) – Available for Crystal and Internal Oscillators 
• Two External RC modes, up to 4 MHz 
• Two External Clock modes, up to 40 MHz 
• Internal Oscillator Block: 
- Fast wake from Sleep and Idle, 1 µs typical 
- 8 use-selectable frequencies, from 31 kHz to 8 MHz 
- Provides a complete range of clock speeds from 31 kHz to 32 MHz when used with PLL 
- User-tunable to compensate for frequency drift 
• Secondary Oscillator using Timer1 @ 32 kHz 
• Fail-Safe Clock Monitor: - Allows for safe shutdown if peripheral clock stops 

Peripheral Features: 
• High-Current Sink/Source 25 mA/25 mA 
• Three Programmable External Interrupts 
• Four Input Change Interrupts 
• Up to 2 Capture/Compare/PWM (CCP) modules, one with Auto-Shutdown (28-pin devices) 
• Enhanced Capture/Compare/PWM (ECCP) module (40/44-pin devices only): 
- One, two or four PWM outputs 
- Selectable polarity 
- Programmable dead time 
- Auto-shutdown and auto-restart 
• Master Synchronous Serial Port (MSSP) module Supporting 3-Wire SPI (all 4 modes) and I2C™ Master and Slave modes 
• Enhanced Addressable USART module: 
- Supports RS-485, RS-232 and LIN/J2602 
- RS-232 operation using internal oscillator block (no external crystal required) 
- Auto-wake-up on Start bit 
- Auto-Baud Detect 
• 10-Bit, up to 13-Channel Analog-to-Digital (A/D) Converter module: 
- Auto-acquisition capability 
- Conversion available during Sleep 
• Dual Analog Comparators with Input Multiplexing 
• Programmable 16-Level High/Low-Voltage Detection (HLVD) module: 
- Supports interrupt on High/Low-Voltage Detection