Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

556

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

The USB Host Port (UHP) interfaces the USB with the host application. It handles Open HCI protocol (Open Host
Controller Interface) as well as USB v2.0 Full-speed and Low-speed protocols. 

The USB Host Port integrates a root hub and transceivers on downstream ports. It provides several high-speed half-
duplex serial communication ports at a baud rate of 12 Mbit/s. Up to 127 USB devices (printer, camera, mouse,
keyboard, disk, etc.) and the USB hub can be connected to the USB host in the USB “tiered star” topology.

The USB Host Port controller is fully compliant with the OpenHCI specification. The USB Host Port User Interface
( r e g i s t e r s   d e s c r i p t i o n )   c a n   b e   f o u n d   i n   t h e   O p e n   H C I   R e v   1 . 0   S p e c i f i c a t i o n   a v a i l a b l e   o n

. The standard OHCI USB stack driver can be easily

ported to ATMEL’s architecture in the same way all existing class drivers run without hardware specialization.

This means that all standard class devices are automatically detected and available to the user application. As an
example, integrating an HID (Human Interface Device) class driver provides a plug & play feature for all USB keyboards
and mouses.



Compliant with OpenHCI Rev 1.0 Specification



Compliant with USB V2.0 Full-speed and Low-speed Specification



Supports Both Low-speed 1.5 Mbps and Full-speed 12 Mbps USB devices



Root Hub Integrated with 1 Downstream USB Ports



Embedded USB Transceivers 



Supports Power Management