Datasheet

849
SAM9263 [DATASHEET]
Atmel-6249N-ATARM-SAM9263-Datasheet_14-Mar-16
41. USB Host Port (UHP)
41.1 Description
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
(registers description) can be found in the Open HCI Rev 1.0 Specification available on www.hp.com. 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.
41.2 Embedded Characteristics
 Compliance with Open HCI Rev 1.0 Specification
 Compliance with USB V2.0 Full-speed and Low-speed Specification
 Supports both Low-Speed 1.5 Mbps and Full-speed 12 Mbps devices
 Root hub integrated with two downstream USB ports
 Two embedded USB transceivers
 Supports power management
 Operates as a master on the Matrix
41.3 Block Diagram
Figure 41-1. Block Diagram
PORT S/M
PORT S/M
USB transceiver
USB transceiver
DP
DM
DP
DM
Embedded USB
v2.0 Full-speed Transceiver
Root Hub
and
Host SIE
List Processor
Block
FIFO 64 x 8
HCI
Slave Block
OHCI
Registers
OHCI Root
Hub Registers
AHB
ED & TD
Regsisters
Control
HCI
Master Block
Data
uhp_int
MCK
UHPCK
AHB
Slave
Master