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EPF10K30A 数据表(PDF) 18 Page - Altera Corporation |
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EPF10K30A 数据表(HTML) 18 Page - Altera Corporation |
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18 / 128 page  18 Altera Corporation FLEX 10K Embedded Programmable Logic Device Family Data Sheet LE Operating Modes The FLEX 10K LE can operate in the following four modes: ■ Normal mode ■ Arithmetic mode ■ Up/down counter mode ■ Clearable counter mode Each of these modes uses LE resources differently. In each mode, seven available inputs to the LE—the four data inputs from the LAB local interconnect, the feedback from the programmable register, and the carry-in and cascade-in from the previous LE—are directed to different destinations to implement the desired logic function. Three inputs to the LE provide clock, clear, and preset control for the register. The Altera software, in conjunction with parameterized functions such as LPM and DesignWare functions, automatically chooses the appropriate mode for common functions such as counters, adders, and multipliers. If required, the designer can also create special-purpose functions which use a specific LE operating mode for optimal performance. The architecture provides a synchronous clock enable to the register in all four modes. The Altera software can set DATA1 to enable the register synchronously, providing easy implementation of fully synchronous designs. Figure 9 shows the LE operating modes. |
类似零件编号 - EPF10K30A |
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类似说明 - EPF10K30A |
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