NH82801GHM S L8YR Intel, NH82801GHM S L8YR Datasheet - Page 207

• Manufacturer Part Number: NH82801GHM S L8YR
• Manufacturer: Intel

Specifications of NH82801GHM S L8YR

• Lead Free Status / RoHS Status: Compliant

Functional Description
5.20
Table 5-48. UHCI vs. EHCI
5.20.1
5.20.1.1
5.20.1.2
Intel
®
ICH7 Family Datasheet
USB EHCI Host Controller (D29:F7)
The ICH7 contains an Enhanced Host Controller Interface (EHCI) host controller which
supports up to eight USB 2.0 high-speed root ports. USB 2.0 allows data transfers up to
480 Mb/s using the same pins as the eight USB full-speed/low-speed ports. The ICH7
contains port-routing logic that determines whether a USB port is controlled by one of
the UHCI controllers or by the EHCI controller. USB 2.0 based Debug Port is also
implemented in the ICH7.
A summary of the key architectural differences between the USB UHCI host controllers
and the EHCI host controller are shown in
EHC Initialization
The following descriptions step through the expected ICH7 Enhanced Host Controller
(EHC) initialization sequence in chronological order, beginning with a complete power
cycle in which the suspend well and core well have been off.
BIOS Initialization
BIOS performs a number of platform customization steps after the core well has
powered up. Contact your Intel Field Representative for additional ICH7 BIOS
information.
Driver Initialization
See Chapter 4 of the Enhanced Host Controller Interface Specification for Universal
Serial Bus, Revision 1.0.
Accessible by
Memory Data Structure
Differential Signaling Voltage
Ports per Controller
Parameter
I/O space
Single linked list
3.3 V
2
USB UHCI
Table
Memory Space
Separated in to Periodic and Asynchronous
lists
400 mV
8
5-48.
USB EHCI
207