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EPF10K40RC240-4N 数据表(PDF) 14 Page - Altera Corporation |
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EPF10K40RC240-4N 数据表(HTML) 14 Page - Altera Corporation |
14 / 128 page 14 Altera Corporation FLEX 10K Embedded Programmable Logic Device Family Data Sheet Each LAB provides four control signals with programmable inversion that can be used in all eight LEs. Two of these signals can be used as clocks; the other two can be used for clear/preset control. The LAB clocks can be driven by the dedicated clock input pins, global signals, I/O signals, or internal signals via the LAB local interconnect. The LAB preset and clear control signals can be driven by the global signals, I/O signals, or internal signals via the LAB local interconnect. The global control signals are typically used for global clock, clear, or preset signals because they provide asynchronous control with very low skew across the device. If logic is required on a control signal, it can be generated in one or more LEs in any LAB and driven into the local interconnect of the target LAB. In addition, the global control signals can be generated from LE outputs. Logic Element The LE, the smallest unit of logic in the FLEX 10K architecture, has a compact size that provides efficient logic utilization. Each LE contains a four-input LUT, which is a function generator that can quickly compute any function of four variables. In addition, each LE contains a programmable flipflop with a synchronous enable, a carry chain, and a cascade chain. Each LE drives both the local and the FastTrack Interconnect. See Figure 6. Figure 6. FLEX 10K Logic Element To LAB Local Interconnect Carry-In Clock Select Carry-Out Look-Up Table (LUT) Clear/ Preset Logic Carry Chain Cascade Chain Cascade-In Cascade-Out To FastTrack Interconnect Programmable Register PRN CLRN DQ ENA Register Bypass Chip-Wide Reset data1 data2 data3 data4 labctrl1 labctrl2 labctrl3 labctrl4 |
类似零件编号 - EPF10K40RC240-4N |
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类似说明 - EPF10K40RC240-4N |
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