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Altera_Forum
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16 years ago

Logic Element

I have 1 design which use total of 734 logic element. When i want to optimize the design by doing chaining(remove one 32 bit register), the logic element used is 733. since 1 FF consists of 2 NAND...
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Altera_Forum
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16 years ago

Well the term "logic element" is a bit fuzzy and truly is defined by the architecture. But specifically according to page 2-2 of the Cyclone II datasheet:

http://www.altera.com/literature/hb/cyc2/cyc2_cii51002.pdf

a LE consists of:

--- Quote Start ---

- A four-input look-up table (LUT), which is a function generator that

can implement any function of four variables

- A programmable register

- A carry chain connection

- A register chain connection

- The ability to drive all types of interconnects: local, row, column,

register chain, and direct link interconnects

- Support for register packing

- Support for register feedback

--- Quote End ---

Jake