●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
