Stone Computers Notebook User Manual page 53

3
Using Your Notebook
Dimensions of ExpressCard
Current CardBus PC cards are 54 millimeters wide. ExpressCard can be
divided into two categories, based on width. Most designs will use the
ExpressCard 34 design, which sets the width at 34 millimeters. For some
applications, the wider ExpressCard 54 standard will be used to produce cards
that can handle the higher thermal requirements of those applications.
All ExpressCard modules are 5mm thick but the standard also allows for card
developers to build longer 'extended' modules.
Native Bus Connection
The ExpressCard standard supports both the USB 2.0 and PCI Express
interfaces. Card manufacturers are able to choose whichever bus is appropriate
to their application; the performance of PCI Express, or from the wide range
of solutions supported by USB. All host PC ExpressCard slots will support
cards using either interface. The host platform no longer needs to incorporate
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