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DEVICE OVERVIEW

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

? PIC18F2455 ? PIC18LF2455

? PIC18F2550 ? PIC18LF2550

? PIC18F4455 ? PIC18LF4455

? PIC18F4550 ? PIC18LF4550

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 PIC18F2455/2550/4455/4550 family introduces design enhancements that make these microcontrollers a logical choice for many high-performance, power sensitive applications.

Universal Serial Bus Features:

? USB V2.0 Compliant

? Low Speed (1.5 Mb/s) and Full Speed (12 Mb/s)

? Supports Control, Interrupt, Isochronous and Bulk Transfers

? Supports up to 32 Endpoints (16 bidirectional)

? 1 Kbyte Dual Access RAM for USB

? On-Chip USB Transceiver with On-Chip Voltage Regulator

? Interface for Off-Chip USB Transceiver

? Streaming Parallel Port (SPP) for USB streaming transfers (40/44-pin devices only)

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 Typical, 32 kHz, 2V

? Watchdog Timer: 2.1 μA Typical

? Two-Speed Oscillator Start-up

Flexible Oscillator Structure:

? Four Crystal modes, including High-Precision PLL for USB

? Two External Clock modes, Up to 48 MHz

? Internal Oscillator Block:

- 8 user-selectable frequencies, from 31 kHz to 8 MHz

- User-tunable to compensate for frequency drift

? Secondary Oscillator using Timer1 @ 32 kHz

? Dual Oscillator Options allow Microcontroller and USB module to Run at Different Clock Speeds

? Fail-Safe Clock Monitor:

- Allows for safe shutdown if any clock stops

Peripheral Highlights:

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

? Three External Interrupts

? Four Timer modules (Timer0 to Timer3)

? Up to 2 Capture/Compare/PWM (CCP) modules:

- Capture is 16-bit, max. resolution 5.2 ns (TCY/16)

- Compare is 16-bit, max. resolution 83.3 ns (TCY)

- PWM output: PWM resolution is 1 to 10-bit

? Enhanced Capture/Compare/PWM (ECCP) module:

- Multiple output modes

- Selectable polarity

- Programmable dead time

- Auto-shutdown and auto-restart

? Enhanced USART module:

- LIN bus support

? Master Synchronous Serial Port (MSSP) module Supporting 3-Wire SPI (all 4 modes) and I2C? Master and Slave modes

? 10-Bit, Up to 13-Channel Analog-to-Digital Converter (A/D) module with Programmable Acquisition Time

? Dual Analog Comparators with Input Multiplexing