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Author: Admin | 2025-04-28
Of what is on the silicon • Pre-defined power, clock, test structures Structured ASICs • FPGA vendors have also designed their own version of the structured ASICs: • Altera(HardCopy) • Same design cells as FPGA, but programmable routing replaced with fixed wire interconnects • Xilinx(EasyPath) • “customer specific FPGA”; 30-70% cheaper than standard FPGA, same standard FPGA cells • Both designs have the programming capabilities removedStructured ASICs Advantages • Mainly used for mid-density designs • High performance (close to standard-cell) • Low power consumption • Less complex (fewer layers to fabricate) • Small time-to-market (pre-defined cell blocks)Structured ASICs Disadvantages • Design tools • Expensive • Immature architecture • Therefore have not been formally evaluated and compared; • Tradeoffs within the architecture (LUTs, RAM size)Architecture Summary *used worst-case values (from Kuon, Rose) Structured ASICs have many of the advantages of both FPGAs and standard ASICsConclusion • FPGAs, Structured ASICs and ASICs each have their own advantages and disadvantages • ASICs • High costs, high performance • Low flexibility • Difficult and long design cycle • FPGAs • Low cost, low performance • Reconfigurable • Quick and easy for designersQuestions • Do you have any questions? • Project …..Project Outline: • Start with 1-bit ALU design using VHDL (Xilinx) • Modify an ALU from a 4-bit to 16-bits • Add other capabilities to the ALU (Multiplication, Division) • Duplicate the ALU to max capacity of the FPGA • The ALUs are connected using different connections: • Bus • Point-to-point matrix connection • Comparisons between the two implementations • Solve Benchmarks TERM PROJECTProject Outline: • Start with 1-bit ALU design • Re-learn VHDL code • Modify an ALU from a 4-bit to 16-bits • Add other capabilities to the ALU (Multiplication, Division) • Duplicate the ALU to max capacity of the FPGA • The ALUs are connected using different connections: • Bus • Point-to-point matrix connection • Comparisons between the two implementations • Solve Benchmarks TERM PROJECT
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