By Steve Kilts
This booklet offers the complex problems with FPGA layout because the underlying topic of the paintings. In perform, an engineer mostly should be mentored for a number of years earlier than those rules are thoroughly applied. the themes that would be mentioned during this publication are necessary to designing FPGA's past average complexity. The target of the e-book is to give useful layout recommendations which are differently purely to be had via mentorship and real-world event.
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Extra info for Advanced FPGA Design: Architecture, Implementation, and Optimization
1 ROLLING UP THE PIPELINE The method of “rolling up the pipeline” is the opposite operation to that described in the previous chapter to improve throughput by “unrolling the loop” to achieve maximum performance. When we unrolled the loop to create a pipeline, we also increased the area by requiring more resources to hold intermediate values and replicating computational structures that needed to run in parallel. Conversely, when we want to minimize the area of a design, we must perform these operations in reverse; that is, roll up the pipeline so that logic resources can be reused.
Dual-edge triggered ﬂip-ﬂops provide a mechanism to propagate data on both edges of the clock instead of just one. This allows the designer to run a clock at half the frequency that would otherwise be required to achieve a certain level of functionality and performance. Coding a dual-edge triggered ﬂip-ﬂop is very straightforward. The following example illustrates this with a simple shift register. Note that the input signal is captured on the rising edge of the clock and is then passed to dual-edge ﬂip-ﬂops.
Sharing logic resources between different functional operations. The impact of reset on area optimization. Impact of FPGA resources that lack reset capability. Impact of FPGA resources that lack set capability. Impact of FPGA resources that lack asynchronous reset capability. Impact of RAM reset. Optimization using set/reset pins for logic implementation. Advanced FPGA Design. By Steve Kilts Copyright # 2007 John Wiley & Sons, Inc. 1 ROLLING UP THE PIPELINE The method of “rolling up the pipeline” is the opposite operation to that described in the previous chapter to improve throughput by “unrolling the loop” to achieve maximum performance.