8X930HX Datasheet, PDF (37/38 Pages) Intel Corporation – UNIVERSAL SERIAL BUS HUB PERIPHERAL CONTROLLER

8x930Hx UNIVERSAL SERIAL BUS PERIPHERAL CONTROLLER
8.7 Unused Downstream Ports
If the USB downstream ports are not used, it is still
required that the two data lines be pulled low
externally (similar to a disconnect) so that the inputs
are not floating. This will eliminate the possibility of
induced system noise. When migrating from the
8x930HD/HE (3 external downstream port device)
to the 8x930HF/HG (4 external downstream port
device), and the additional USB port is not being
used in the application, D_M5 and D_P5 will still require
15K external pulldown resistors. Do not leave the
unused port disconnected.
10.0 DATASHEET REVISION HISTORY
Datasheets are changed as new device information
becomes available. Verify with your local Intel sales
office that you have the latest version before
finalizing a design or ordering devices.
This (-003) revision of the 8x930Hx datasheet
replaces earlier product information. The following
changes were made in this revision:
1. Added the 8x930HF/HG 4 external
downstream port device.
9.0 8x930Hx ERRATA
The 8x930Hx may contain design defects or errors
known as errata. Characterized errata that may
cause the 8x930Hx’s operational behavior to
deviate from published specifications are
documented in a specification update (order
number 272962). Specification updates can be
obtained from your local Intel sales office or from
the World Wide Web (www.intel.com).
ADVANCE INFORMATION
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