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EP1C12F100I7 Datasheet(PDF) 9 Page - Altera Corporation |
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EP1C12F100I7 Datasheet(HTML) 9 Page - Altera Corporation |
9 / 94 page Altera Corporation 9 Preliminary Information Cyclone FPGA Family Data Sheet Logic Elements The smallest unit of logic in the Cyclone architecture, the LE, is compact and provides advanced features with efficient logic utilization. Each LE contains a four-input LUT, which is a function generator that can implement any function of four variables. In addition, each LE contains a programmable register and carry chain with carry select capability. A single LE also supports dynamic single bit addition or subtraction mode selectable by an LAB-wide control signal. Each LE drives all types of interconnects: local, row, column, LUT chain, register chain, and direct link interconnects. See Figure 5. Figure 5. Cyclone LE labclk1 labclk2 labclr2 labpre/aload Carry-In1 Carry-In0 LAB Carry-In Clock & Clock Enable Select LAB Carry-Out Carry-Out1 Carry-Out0 Look-Up Table (LUT) Carry Chain Row, column, and direct link routing Row, column, and direct link routing Programmable Register PRN/ALD CLRN D Q ENA Register Bypass Packed Register Select Chip-Wide Reset labclkena1 labclkena2 Synchronous Load and Clear Logic LAB-wide Synchronous Load LAB-wide Synchronous Clear Asynchronous Clear/Preset/ Load Logic data1 data2 data3 data4 LUT chain routing to next LE labclr1 Local Routing Register chain output ADATA addnsub Register Feedback Register chain routing from previous LE |
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