Sequential verulog topics

Synthesis Design Flow Having understood how basic Verilog constructs are interpreted by the logic synthesis tool, let us now discuss the synthesis design flow

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Assertion Checking The traditional verification flow discussed in the previous section is a black box approach, i.e.

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Exercises 1: A 4-bit full adder with carry lookahead was defined in Example 6-5 on page 109, using an RTL description. Synthesize the full adder, using a technology library available to you.

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Example of Sequential Circuit Synthesis In Section 14.4.2, An Example of RTL-to-Gates, we synthesized a combinational circuit. Let us now consider an example of sequential

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Verification of Gate-Level Netlist The optimized gate-level netlist produced by the logic synthesis tool must be verified for functionality.

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Switch-level modeling is at a very low level of design abstraction. Designers use switch modeling in rare cases when they need to customize a leaf cell.

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Examples In this section, we discuss how to build practical digital circuits, using switch-level constructs. 11.2.1 CMOS Nor Gate Though Verilog

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Switch-Modeling Elements Verilog provides various constructs to model switch-level circuits. Digital circuits at MOS-transistor level are described using these elements.[1]

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Timing Checks In the earlier sections of this chapter, we discussed how to specify path delays. The purpose of specifying path delays is to simulate the timing of the actual

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Types of Delay Models There are three types of delay models used in Verilog: distributed, lumped, and pin-to-pin (path) delays. 10.1.1 Distributed Delay Distributed

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Verilog HDL Synthesis For the purpose of logic synthesis, designs are currently written in an HDL at a register transfer level (RTL). The term RTL is used for an HDL

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PLI Interface provides a set of C interface routines to read, write, and extract information about the internal data structures of the design. Designers can write their own system tasks

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Internal Data Representation Before we understand how to use PLI library routines, it is first necessary to describe how a design is viewed internally in the simulator. Each module is viewed

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UDP Table Shorthand Symbols Shorthand symbols for levels and edge transitions are provided so UDP tables can be written in a concise manner.

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Sequential UDPs Sequential UDPs differ from combinational UDPs in their definition and behavior. Sequential UDPs have the following differences

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