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