DEVICE OVERVIEW

This document contains device-specific information for the following devices:

? PIC18F2331 ? PIC18LF2331

? PIC18F2431 ? PIC18LF2431

? PIC18F4331 ? PIC18LF4331

? PIC18F4431 ? PIC18LF4431

This family offers the advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price, with the addition of high-endurance enhanced Flash program memory and a high-speed 10-bit A/D Converter. On top of these features, the PIC18F2331/2431/4331/4431 family introduces design enhancements that make these microcontrollers a logical choice for many high-performance, power control and motor control applications.

14-Bit Power Control PWM Module:

? Up to 4 Channels with Complementary Outputs

? Edge or Center-Aligned Operation

? Flexible Dead-Band Generator

? Hardware Fault Protection Inputs

? Simultaneous Update of Duty Cycle and Period:

- Flexible Special Event Trigger output

Motion Feedback Module:

? Three Independent Input Capture Channels:

- Flexible operating modes for period and pulse-width measurement

- Special Hall sensor interface module

- Special Event Trigger output to other modules

? Quadrature Encoder Interface:

- 2-phase inputs and one index input from encoder

- High and low position tracking with direction status and change of direction interrupt

- Velocity measurement

High-Speed, 200 ksps 10-Bit A/D Converter:

? Up to 9 Channels

? Simultaneous, Two-Channel Sampling

? Sequential Sampling: 1, 2 or 4 Selected Channels

? Auto-Conversion Capability

? 4-Word FIFO with Selectable Interrupt Frequency

? Selectable External Conversion Triggers

? Programmable Acquisition Time

Flexible Oscillator Structure:

? Four Crystal modes up to 40 MHz

? Two External Clock modes up to 40 MHz

? Internal Oscillator Block:

- 8 user-selectable frequencies: 31 kHz to 8 MHz

- OSCTUNE can compensate for frequency drift

? Secondary Oscillator using Timer1 @ 32 kHz

? Fail-Safe Clock Monitor:

- Allows for safe shutdown of device if clock fails

Power-Managed Modes:

? Run: CPU on, Peripherals on

? Idle: CPU off, Peripherals on

? Sleep: CPU off, Peripherals off

? Ultra Low, 50 nA Input Leakage

? Idle mode Currents Down to 5.8 ?A, Typical

? Sleep Current Down to 0.1 ?A, Typical

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

? Watchdog Timer (WDT), 2.1 ?A, typical

? Oscillator Two-Speed Start-up

- Fast wake from Sleep and Idle, 1 ?s, typical

Peripheral Highlights:

? High-Current Sink/Source 25 mA/25 mA

? Three External Interrupts

? Two Capture/Compare/PWM (CCP) modules

? Enhanced USART module:

- Supports RS-485, RS-232 and LIN/J2602

- Auto-wake-up on Start bit

- Auto-Baud Detect

Special Microcontroller Features:

? 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

? Self-Programmable under Software Control

? Priority Levels for Interrupts

? 8 x 8 Single-Cycle Hardware Multiplier

? Extended Watchdog Timer (WDT):

- Programmable period from 41 ms to 131s

? Single-Supply In-Circuit Serial Programming? (ICSP?) via Two Pins

? In-Circuit Debug (ICD) via Two Pins:

- Drives PWM outputs safely when debugging