Datasheet

626

32072H–AVR32–10/2012

AT32UC3A3

27.4 Application Block Diagram

Depending on the USB operating mode (device-only, reduced-host modes) and the power

source (bus-powered or self-powered), there are different typical hardware implementations.

27.4.1 Device Mode

27.4.1.1 Bus-Powered device

Figure 27-2. Bus-Powered Device Application Block Diagram

USB

2.0 Core

USB_VBUS

DMFS

DPFS

USB_ID

USB_VBOF

I/O

Controller

UTMI

DMHS

DPHS

USB

Connector

VBus

D-

D+

GND

39 ohms

3.3 V

Regulator

VDD