Instant Prototype With the AT43312A Hub Controller
Reduce Design Cycle
Reduce System Debugging
Simplify Component Selection
Avoid Typical Design Problems
The AT43DK312A comes with everything designers need to develop a full-featured
USB Hub. To eliminate typical prototyping hassles, a fully populated stand-alone hub
is included. Designers can take the stand-alone hub from the box to the system to see
the operation of the AT43312A hub controller chip. An application note explains the
component selection and resolves typical problems for the designer.
Rev. 1641A–04/00
Stand-alone Hub
The hub may immediately be plugged into any USB system. The only requirements are that the system has an
operational USB port and that the system has the USB
drivers enabled on the operating system.
The bus-powered portion of the controller will configure
without the power supply attached. However, the power
supply must be connected if the devices are to be attached
to the downstream ports. Next, connect the upstream port
to the USB connector on the computer. Windows will flash
a “New Hardware Found” box indicating the “Atmel USB
Hub” was detected and automatically load the generic USB
hub drivers. USB check tests or downstream devices can
then be used on the configured hub.
The application note covers the latest information detailing
how to design a USB hub with the AT43312A chip. Expla-
nations of component selection, USB hub requirements,
and design insights will assist designers in smoothly integrating a USB hub onto existing or new designs.
By understanding the reference design, layout and component selection may be optimized for specific design constraints.
• Application Note
• Reference Design Schematics
• Bill of Materials
• AT43312A Datasheet
• Bus- or Self-powered Operation (Jumper Selectable)
• USB Cable
• Power Supply
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