40.2 Features

The following are key features of the USB:

  • Compatible with the USB 2.1 specification
  • USB Embedded Host and Device mode
  • Supports full (12 Mbit/s) and low (1.5 Mbit/s) speed communication
  • Supports Link Power Management (LPM-L1) protocol
  • On-chip transceivers with built-in pull-ups and pull-downs
  • On-Chip USB serial resistors
  • 1 kHz SOF clock available on external pin
  • Device mode
    • Supports 8 IN endpoints and 8 OUT endpoints
    • No endpoint size limitations
    • Built-in DMA with multi-packet and dual bank for all endpoints
    • Supports feedback endpoint
    • Supports crystal less clock
  • Host mode
    • Supports 8 physical pipes
    • No pipe size limitations
    • Supports multiplexed virtual pipe on one physical pipe to allow an unlimited USB tree
    • Built-in DMA with multi-packet support and dual bank for all pipes
    • Supports feedback endpoint
    • Supports the USB 2.0 Phase-locked SOFs feature