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EPM7064S 数据表(PDF) 12 Page - Altera Corporation |
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EPM7064S 数据表(HTML) 12 Page - Altera Corporation |
12 / 66 page 12 Altera Corporation MAX 7000 Programmable Logic Device Family Data Sheet Shareable Expanders Each LAB has 16 shareable expanders that can be viewed as a pool of uncommitted single product terms (one from each macrocell) with inverted outputs that feed back into the logic array. Each shareable expander can be used and shared by any or all macrocells in the LAB to build complex logic functions. A small delay (tSEXP) is incurred when shareable expanders are used. Figure 5 shows how shareable expanders can feed multiple macrocells. Figure 5. Shareable Expanders Shareable expanders can be shared by any or all macrocells in an LAB. Parallel Expanders Parallel expanders are unused product terms that can be allocated to a neighboring macrocell to implement fast, complex logic functions. Parallel expanders allow up to 20 product terms to directly feed the macrocell OR logic, with five product terms provided by the macrocell and 15 parallel expanders provided by neighboring macrocells in the LAB. Macrocell Product-Term Logic Product-Term Select Matrix Macrocell Product-Term Logic 36 Signals from PIA 16 Shared Expanders |
类似零件编号 - EPM7064S |
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类似说明 - EPM7064S |
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