DEVICE OVERVIEW

This document contains device specific information for the following devices:

• PIC18F2420 • PIC18LF2420

• PIC18F2520 • PIC18LF2520

• PIC18F4420 • PIC18LF4420

• PIC18F4520 • PIC18LF4520

This family offers the advantages of all PIC18 micro controllers – namely, high computational performance at an economical price – with the addition of high endurance, Enhanced Flash program memory. On top of these features, the PIC18F2420/2520/4420/4520 family introduces design enhancements that make these microcontrollers a logical choice for many high performance, power sensitive applications.

Power Managed Modes:

• Run: CPU on, peripherals on

• Idle: CPU off, peripherals on

• Sleep: CPU off, peripherals off

• Idle mode currents down to 5.8 µA typical

• Sleep mode current down to 0.1 µA typical

• Timer1 Oscillator: 1.8 µA, 32 kHz, 2V

• Watchdog Timer: 2.1 µA

• Two-Speed Oscillator Start-up

Peripheral Highlights:

• 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 1.2

- 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 Converter module (A/D):

- Auto-acquisition capability

- Conversion available during Sleep

• Dual analog comparators with input multiplexing)

Flexible Oscillator Structure:

• Four Crystal modes, up to 40 MHz

• 4X Phase Lock Loop (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:

- 8 user 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

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 16-level High/Low-Voltage

Detection (HLVD) module:

- Supports interrupt on High/Low-Voltage Detection

• Programmable Brown-out Reset (BOR

- With software enable option