Advanced FPGA Design: Architecture, Implementation, and by Steve Kilts

By Steve Kilts

This booklet offers the complicated problems with FPGA layout because the underlying subject matter of the paintings. In perform, an engineer commonly has to be mentored for numerous years ahead of those ideas are correctly applied. the themes that might be mentioned during this booklet are necessary to designing FPGA's past average complexity. The target of the ebook is to give sensible layout options which are in a different way basically to be had via mentorship and real-world adventure.

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Advanced FPGA Design: Architecture, Implementation, and Optimization

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The counters in each module also have completely different characteristics. In module A, the counter is 8 bits, free running, and rolls over automatically. In module B, the counter is 11 bits and resets at a predefined value (1666). 4. Here we were able to create a global 11-bit counter that satisfied the requirement of both module A and module B. For compact designs where area is the primary requirement, search for resources that have similar counterparts in other modules that can be brought to a global point in the hierarchy and shared between multiple functional areas.

To minimize the power dissipation of input devices, minimize the rise and fall times of the signals that drive the input. Another important conclusion can be drawn from the above equations. , when the gate is not switching), the transistor previously in cutoff will enter into the saturation region and begin to dissipate a small amount of current. This can be a problem in systems where smaller signal swings are used to drive inputs that are powered by a higher voltage. In harmony with the principle described above, a floating input may be an even worse problem than an underdriven input.

4 DUAL-EDGE TRIGGERED FLIP-FLOPS Due to the fact that power dissipation is proportional to the frequency that a signal toggles, it is desirable to maximize the amount of functionality for each toggle of a high fan-out net. Most likely, the highest fan-out net is the system clock, and thus any techniques to reduce the frequency of this clock would have a dramatic impact on dynamic power consumption. Dual-edge triggered flip-flops provide a mechanism to propagate data on both edges of the clock instead of just one.

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