AT91SAM9G45B-CU Datasheet, PDF (789/1185 Pages) ATMEL Corporation – AT91SAM ARM-based Embedded MPU

Figure 37-3. UHP Clock trees
UPLL (480 MHz)
AHB
MCK
EHCI
Master
Interface
EHCI
User
Interface
USB 2.0 EHCI
Host Controller
Port
Router
OHCI
Master
Interface
OHCI
User
Interface
USB 1.1 OHCI
Host Controller
Root Hub
and
Host SIE
30 MHz
UTMI transceiver
30 MHz
UTMI transceiver
OHCI clocks
37.5.2 Interrupt
The USB host interface has an interrupt line connected to the Advanced Interrupt Controller (AIC).
Handling USB host interrupts requires programming the AIC before configuring the UHP HS.
SAM9G45 [DATASHEET]
6438K–ATARM–12-Feb-13
789