DEVICE OVERVIEW

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

  • PIC18F2682

  • PIC18F2685

  • PIC18F4682

  • PIC18F4685

This family of devices 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. In addition to these features, the PIC18F2682/2685/4682/4685 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 currents down to 0.1 μA typical

• Timer1 Oscillator: 1.1 μA, 32 kHz, 2V

• Watchdog Timer: 2.1 μA

• Two-Speed Oscillator Start-up

Flexible Oscillator Structure:

• 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:

   - 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 with optional Extended Instruction Set

• 100,000 Erase/Write Cycle Enhanced Flash Program Memory typical

• 1,000,000 Erase/Write Cycle Data EEPROM Memory typical

• Flash/Data EEPROM Retention: > 40 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 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

Peripheral Highlights:

• High-Current Sink/source 25 mA/25 mA

• Three External Interrupts

• One Capture/Compare/PWM (CCP1) module

• Enhanced Capture/Compare/PWM (ECCP1) 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 1.3

   - RS-232 operation using internal oscillator block (no external crystal required)

   - Auto-wake-up on Start bit

   - Auto-Baud Detect

• 10-Bit, up to 11-Channel Analog-to-Digital Converter module (A/D), up to 100 ksps:

   - Auto-acquisition capability

   - Conversion available during Sleep

• Dual Analog Comparators with Input Multiplexing

ECAN Module Features:

• Message bit rates up to 1 Mbps

• Conforms to CAN 2.0B ACTIVE Specification

• Fully Backward Compatible with PIC18XXX8 CAN modules

• Three Modes of Operation:

   - Legacy, Enhanced Legacy, FIFO

• Three Dedicated Transmit Buffers with Prioritization

• Two Dedicated Receive Buffers

• Six Programmable Receive/Transmit Buffers

• Three Full, 29-Bit Acceptance Masks

• 16 Full, 29-Bit Acceptance Filters w/Dynamic Association

• DeviceNet™ Data Byte Filter Support

• Automatic Remote Frame Handling

• Advanced Error Management Features