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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 ?A typical

? Sleep mode current down to 0.1 ?A typical

? Timer1 Oscillator: 1.8 ?A, 32 kHz, 2V

? Watchdog Timer: 2.1 ?A

? 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