Intel E3815 FH8065301567411 Data Sheet

 

Intel

®

 Atom™ Processor E3800 Product Family

Datasheet

2445

The USB device controller can control one USB 3.0 Device port. Either a combo SS + 
ULPI Device port, or UPLI only port. It supports hosts conforming to USB 3.0 at bit 
rates up to 5 Gbps on USB3DEV interface as well as USB 2.0 hosts at up to 480 Mbps 
via a PHY on ULPI.

Features supported by the Device Controller include:

•

Enumerable by both ACPI and PCI. The USB3 device subsystem is designed to 
appear to the OS as a true PCI device. It will also support ACPI-enumerated 
methods.

• Device controller registers and data structures are implemented as extensions to 

the EHCI programmers interface. 

•

Support for LPM (Link Power Management)

Some of the key features of the ULPI device controller are:

•

Supports up to 8 endpoints when acting as device

•

8-bit data interface transmitted at 60 MHz ULPI clock

Recommended not to disconnect the connection when a debug session is in progress.

The USB 3.0 device subsystem supports the following device power states:

• D0: Functional and highest power state.

•

RTD3 (D3): Software managed deepest low power state in which state is saved/
restored if needed prior to entry/exit

This is the Functional and highest power state. The USB 3.0 device subsystem is in this 
state when the USB link is in U0 (U0 is the normal operational state where packets can 
be transmitted and received).

D3 is a low power state that is used when the link is suspended; for example, U3 (U3 is 

a link state where a device is put into a suspend state. Significant link and device 

powers are saved). 

This is a software directed state in which the controller is either power gated or the 

power is disabled.