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