Area-efficient memory mapping techniques for programmable logic devices
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United States of America Patent
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Dec 26, 2017
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app pub date -
May 15, 2015
filing date -
May 15, 2015
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Abstract
Various techniques are provided to implement a logical memory in programmable logic devices (PLDs) having embedded block RAMs (EBRs). For example, a computer-implemented method includes determining a main area of a logical memory that can be fully mapped to a first one or more EBRs configured in a first depth-width configuration, mapping the main area to the first one or more EBRs, and mapping the remainder of the logical memory to a second one or more EBRs configured in a second or more depth-width configurations. The mapping of the remainder of the logical memory may be performed hierarchically by a recursive process, in some embodiments. The depth-width configurations and the corresponding mapping may be selected according to an efficiency metric, for example. Other embodiments include a system comprising a PLD and a configuration memory storing configuration data generated by such a method, and a PLD configured with such configuration data.
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