Power Management Features: PIC18F4520-I/PT

• 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:PIC18F4520-I/PT

• 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 the peripheral clock stops

Peripheral Highlights: PIC18F4520-I/PT

• 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

Peripheral Highlights (Continued):PIC18F4520-I/PT

• 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: PIC18F4520-I/PT
– Auto-acquisition capability
– Conversion available during Sleep
• Dual Analog Comparators with Input Multiplexing
• Programmable 16-Level High/Low-Voltage

Detection (HLVD) module:PIC18F4520-I/PT
– Supports interrupt on High/Low-Voltage Detection
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 – PIC18F4520-I/PT
• 1,000,000 Erase/Write Cycle Data EEPROM

Memory Typical – PIC18F4520-I/PT
• 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