DEVICE OVERVIEW
This document contains device-specific information for the following devices:
      • PIC18F6390                 • PIC18F8390
      • PIC18F6490                 • PIC18F8490

This family offers the advantages of all PIC18 microcontrollers – namely, high computational performance at an economical price. In addition to these features, the PIC18F6390/6490/8390/8490 family introduces design enhancements that make these microcontrollers a logical choice for many high-performance, power-sensitive applications.

LCD Driver Module Features:
• Direct Driving of LCD Panel
• Up to 48 Segments: Software Selectable
• Programmable LCD Timing module:
   - Multiple LCD timing sources available
   - Up to 4 commons: Static, 1/2, 1/3 or 1/4 multiplex
   - Static, 1/2 or 1/3 bias configuration
• Can drive LCD Panel while in Sleep mode

Power-Managed Modes:
• Run: CPU On, Peripherals On
• Idle: CPU Off, Peripherals On
• Sleep: CPU Off, Peripherals Off
• Run mode Currents Down to 14.0 μA Typical
• Idle mode Currents Down to 5.8 μA Typical
• Sleep Current Down to 0.1 μA Typical
• Timer1 Oscillator: 1.8 μA, 32 kHz, 2V
• Watchdog Timer: 2.1 μA
• Two-Speed Oscillator Start-up

Flexible Oscillator Structure:
• Four Crystal modes:
   - LP: up to 200 kHz
   - XT: up to 4 MHz
   - HS: up to 40 MHz
   - HSPLL: 4-10 MHz (16-40 MHz internal)
• 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 shut down of device if primary
      or secondary clock fails

Peripheral Highlights:
• High-Current Sink/Source 25 mA/25 mA
• Four External Interrupts
• Four Input Change Interrupts
• Four 8-Bit/16-Bit Timer/Counter modules
• Real-Time Clock (RTC) Software module:
   - Configurable 24-hour clock, calendar, automatic
      100-year or 12800-year, day-of-week calculator
   - Uses Timer1
• Up to 2 Capture/Compare/PWM (CCP) modules
• Master Synchronous Serial Port (MSSP) module
   supporting 3-Wire SPI (all 4 modes) and I2C™
   Master and Slave modes
• Addressable USART module:
   - Supports RS-485 and RS-232
• Enhanced Addressable USART module:
   - Supports RS-485, RS-232 and LIN 1.2
   - Auto-wake-up on Start bit
   - Auto-Baud Detect
• 10-Bit, up to 12-Channel Analog-to-Digital (A/D)
   Converter module:
   - Auto-acquisition capability
   - Conversion available during Sleep
• Dual Analog Comparators with Input Multiplexing

Special Microcontroller Features:
• C Compiler Optimized Architecture:
   - Optional extended instruction set designed to
      optimize re-entrant code
• 1000 Erase/Write Cycle Flash Program Memory Typical
• Flash Retention: 100 Years Typical
• Priority Levels for Interrupts
• 8 x 8 Single-Cycle Hardware Multiplier
• Extended Watchdog Timer (WDT):
   - Programmable period from 4 ms to 132s
   - 2% stability over VDD and temperature
• In-Circuit Serial Programming™ (ICSP™) via Two Pins
• In-Circuit Debug (ICD) via Two Pins
• Wide Operating Voltage Range: 2.0V to 5.5V