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基于WP276 -可编程的开发和测试
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With even the lowest cost Spartan™ FPGAs providing hundreds of thousands of gates
and embedded memory blocks， nearly every design is some kind of system rather
than just individual functions or glue logic. With so many functions integrated inside
a single device， how can you be sure that each is performing correctly？ Many
communications to FPGAs occur at a very high speed and cannot be treated as simple
digital Low and High levels. Continuity checks are not enough to verify circuit boards，
backplanes， and cables when devices are operating in excess of 100 MHz， let alone at
several giga-Hertz. Finally， how can you be sure that the other components connected
to your Xilinx device are also functioning correctly？
Creating a design consisting of hundreds of thousands of gates has never been easier.
HDL synthesis tools together with IP cores can soon fill the embedded memory blocks
and logic resources of a large Spartan device. In many cases， the whole system can be
synthesized to fit a single device， allowing you to avoid all the old issues of multi-chip
partitioning. Pass it through the place-and-route tools to provide a finished design，
and all you need is the PCB.
Of course， life isn‘t that simple. Regardless of design capabilities， it is very rare that a
design， especially a large one， will work the first time. （Your design may have been
100% right， but the specification may have been lacking.） Engineering is about making
things work， and this is where we need all the help we can get.
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