Logic Array Blocks and Adaptive Logic Modules in Cyclone ... - Altera

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1-6 ALM Output Figure 1-5: ALM High-Level Block Diagram for Cyclone V Devices ALM Output Altera Corporation dataf0 datae0 dataa datab datac datad datae1 dataf1 shared_arith_in 6-Input LUT 6-Input LUT shared_arith_out carry_in adder0 adder1 carry_out Combinational/ Memory ALUT0 Combinational/ Memory ALUT1 labclk D Q reg0 D Q reg1 D Q reg2 D Q reg3 To General or Local Routing To General or Local Routing To General or Local Routing To General or Local Routing To General or Local Routing To General or Local Routing To General or Local Routing To General or Local Routing The general routing outputs in each ALM drive the local, row, and column routing resources. Two ALM outputs can drive column, row, or direct link routing connections, and one of these ALM outputs can also drive local interconnect resources. The LUT, adder, or register output can drive the ALM outputs. The LUT or adder can drive one output while the register drives another output. Register packing improves device utilization by allowing unrelated register and combinational logic to be packed into a single ALM. Another mechanism to improve fitting is to allow the register output to feed back into the look-up table (LUT) of the same ALM so that the register is packed with its own fan-out LUT. The ALM can also drive out registered and unregistered versions of the LUT or adder output. Logic Array Blocks and Adaptive Logic Modules in Cyclone V Devices CV-52001 2013.05.06 Feedback
CV-52001 2013.05.06 Figure 1-6: ALM Connection Details for Cyclone V Devices dataf0 datae0 dataa datab datac0 datac1 datae1 dataf1 shared_arith_in 4-Input LUT 3-Input LUT 3-Input LUT 4-Input LUT 3-Input LUT 3-Input LUT shared_arith_out ALM Operating Modes carry_in + + carry_out GND VCC syncload aclr[1:0] clk[2:0] sclr The Cyclone V ALM operates in any of the following modes: • Normal mode • Extended LUT mode • Arithmetic mode • Shared arithmetic mode Logic Array Blocks and Adaptive Logic Modules in Cyclone V Devices Feedback CLR D Q CLR D Q CLR D Q CLR D Q ALM Operating Modes Row, Column Direct Link Routing Row, Column Direct Link Routing Local Interconnect Row, Column Direct Link Routing Row, Column Direct Link Routing Local Interconnect 1-7 Altera Corporation
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Logic Array Blocks and Adaptive Logic Modules in Cyclone ... - Altera

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