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应用XC4000E中的专用进位逻辑

消耗积分:5 | 格式:rar | 大小:333 | 2009-05-13

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XC4000E CLBs contain dedicated, hard-wired carry logic
to both accelerate and condense arithmetic functions such
as adders and counters. Adders achieve ripple-carry
delays as low as 350 ps per bit, while utilizing only half a
CLB per bit. This is certainly denser than any other
approach, and in most cases, faster.

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