Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
USB Host Controller Interfaces (xHCI, EHCI)
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
2115
•
Support for USB3 Debug Device
Note:
Recommended not to disconnect the connection when a debug session is in progress.
18.2.2
Features of USB HSIC
HSIC is a 2-signal (strobe and data) source synchronous serial interface for on board
inter-chip USB communication. The interface uses 240 MHz DDR signaling to provide
High-Speed 480 Mb/s USB transfers which are 100% host driver compatible with
traditional USB cable connected topologies. Full Speed (FS) and Low Speed (LS) USB
transfers are not directly supported by the HSIC interface.
inter-chip USB communication. The interface uses 240 MHz DDR signaling to provide
High-Speed 480 Mb/s USB transfers which are 100% host driver compatible with
traditional USB cable connected topologies. Full Speed (FS) and Low Speed (LS) USB
transfers are not directly supported by the HSIC interface.
For details of HSIC applications supported, Contact local Intel Sales office.
Major feature and performance highlights are as follows:
•
Supported by xHCI software host controller interface
•
High-Speed 480 Mb/s data rate only
•
Source-synchronous serial interface
•
Interface Power is only consumed when a transfer is in progress
•
No hot plug removal/attach at HSIC pins
•
Signals driven at 1.2V standard LVCMOS levels
•
Designed for low power applications
•
Support for two host ports compliant to High Speed Inter-Chip Supplement (HSIC)
to the USB 2.0 Specification. (USB 2.0)
to the USB 2.0 Specification. (USB 2.0)
18.3
USB 2.0 Enhanced Host Controller Interface
(EHCI)
The EHCI compliant host controller supports up to 4 USB 2.0 ports in legacy mode. USB
2.0 allows data transfers up to 480 Mbps. The controller integrates a Root Matching
Hub (RMH) to support USB 1.1 devices.
2.0 allows data transfers up to 480 Mbps. The controller integrates a Root Matching
Hub (RMH) to support USB 1.1 devices.
Note:
The EHCI is not used when the xHCI is used. The EHCI is primarily present for legacy
usage, in cases when xHCI support is not available.
usage, in cases when xHCI support is not available.
Note:
Intel recommends using the xHCI controller for the USB2.0 ports irrespective of
whether USB3.0 ports are implemented. The EHCI controller is provided for legacy OS/
driver compatibility which is generally not required for tablet platforms. Using the xHCI
controller will deliver significant power and performance benefits.
whether USB3.0 ports are implemented. The EHCI controller is provided for legacy OS/
driver compatibility which is generally not required for tablet platforms. Using the xHCI
controller will deliver significant power and performance benefits.
When following this recommendation on a platform with no USB3.0 support, the
Windows logo requirement of USB debug port may not be met. Please consult with Intel
regarding the impact of this.
Windows logo requirement of USB debug port may not be met. Please consult with Intel
regarding the impact of this.
Note:
Unlike the xHCI, bandwidth of all four ports on the EHCI is shared across a single HS
(480 Mbps) internal link.
(480 Mbps) internal link.