Applied Formal Verification: For Digital Circuit Design by Douglas Perry, Harry Foster

By Douglas Perry, Harry Foster

Meant for layout engineers, this e-book introduces normal verification thoughts, compares them with formal verification concepts, and offers directions for developing formal excessive point requirement. The authors speak about formal verification strategies for either utilized Boolean and sequential verification, formal estate checking, the method of constructing a proper try plan, and country aid recommendations. The appendices record generic PSL statements for prime point standards and comparable necessities laid out in process Verilog syntax.

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As discussed earlier, HDL simulation can be very slow, allowing a few tens of cycles per second on a typical large design. When millions or billions of cycles are needed to execute a particular scenario, using HDL software simulation can result in extremely long runtimes. 1 Increasing Simulation Speed Millions of dollars of research have been put into techniques for increasing the speed of simulation. Two different types of approaches have been used to increase simulation speed: hardware approaches and software approaches.

10, eight pins connect from the internal FPGA logic to a register and then to an 8-to-1 multiplexer. A single signal connects from the output of the multiplexer to the pin of the FPGA device. That pin connects to the input of a demultiplexer on the second FPGA, whose outputs are registered with another register. Two counters control the states of each multiplexer and demultiplexer. The counters advance each clock cycle to give the next time slot access to the FPGA pin to transfer data. At each clock cycle the counter will select a different input of the multiplexer and transfer it to the physical pin.

The biggest impediment to the emulator is the excessive compile times, which greatly extend the debug cycle. 5 FPGA PROTOTYPING An FPGA prototype uses multiple FPGA devices to implement the design. The design is automatically or manually partitioned into blocks. These blocks are mapped using standard FPGA design software in standard FPGA devices. This approach differs from that of the emulator in the fact that the designers usually build a custom board to interconnect the FPGA devices instead of using FPGA interconnect devices.

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