PIC18F4550-I/P

39632e.pdf

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