In our previous post, we discussed about general codes for some of the most important combinational blocks. In this post, we will discuss general Verilog codes for some of the most important sequential blocks. General Verilog Codes for Sequential Blocks are important to avoid different codes for different design parameters. General Verilog codes make our […]
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In our previous blog, we discussed different combinational circuits but General Verilog codes are essential in writing bigger complex codes for a system. They make it easy for the coders to generalize the overall code. The generalized overall code can then be easily tuned for the design parameters. For example, if a designer writes a
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Pulse Width Modulation (PWM) signal is used in place of a Digital to Analog Converter (DAC) to simplify the digital-to-analog conversion process. PWM is used when we need to generate analog voltage corresponding to some digital value. PWM is a technique where the width of a pulse is varied. This means the duty cycle of
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In the previous post FSM Design, we have discussed design of Mealy and Moore state machines using Verilog. State minimization is important if we want to reduce number of states in a complex FSM which has many redundant states. If the number of states are reduced then number of bits required for state assignment will
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In this Tutorial, a detailed discussion on FPGA implementation of complex digital circuits is discussed. First, a brief overview on FPGA is given then the steps involved in implementing a circuit are illustrated. Specific examples are shown to illustrate the steps. +20
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Design verification is must in designing any system. Design verification and testing is the most tedious job in implementing any complex system. Several foundries are specialized in doing verification and testing. Each and every step of VLSI design needs verification. If there is a fault in any step, one has to go to the early
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Contents for FSM design are Sequence Detector using Mealy Machine Sequence Detector using Moore Machine Serial Adder Vending Machine FSMs, an important category of sequential circuits, are used frequently in designing digital systems. From the daily used electronic machines to the complex digital systems, FSMs are used everywhere. For example, in a station the vending
Contents for the system architectures are Serial Architectures Parallel Architectures Pipelining Comparison Based on the signal acquisition strategy, area and timing constraints digital system architectures can be of the following types Serial Architectures Parallel Architectures Mixed Architectures Go to the Top Serial Architectures The serial architectures process a data stream serially by taking one data
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Contents for memory design are Controlled Register Read Only Memory (ROM) Random Access Memory (RAM) Dual Port Memory Simple Dual Port Memory In digital system design, the usage of memory elements is unavoidable. In some of the systems, data can be pre-stored in a constant memory. Memory elements can be used as temporary storage of
Contents Flip/flops Shift Registers PN Sequence Generator Counters Loadable Counter Clock Division Clock Division by 3 General Approach for Clock Division Sequential Logic Blocks The output of sequential blocks depends on the present state as well as on past state. Sequential circuits work with a reference which is the clock. A clock signal can be
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Contents for combinational circuits are Addition/Subtraction Controlled Add_sub Decoder Converters Parity Check and Generator Comparator Design Wired Shift Variable Shift Block Scale Block Combinational Circuits In this post, the realization of various basic combinational circuits using Verilog is discussed. There is no need to discuss the theory behind the combinational blocks. More about the theoretical
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Contents for Verilog Basics are Dataflow style Behavioral Style Structural Style Mixed Style In this tutorial, different programming styles in Verilog coding will be discussed. Various online tutorials on programming syntax, operators, different commands, assignment strategies and other important topics are already available. Readers can find the references useful for basics. In going through the
Contents for Digital System Design Basics are:- Design Approaches Design Methodologies Binary Number System Fixed Point Format Floating Point Format A system which receives digital inputs and produces digital outputs can be implemented on digital hardware. A digital filter is an example of such system. A digital version of an analog signal is input to
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Over the past several years, digital system design has become dominant in the field of VLSI design for relatively high performance and cost-effective VLSI circuits. The revolutionary nature of these developments is understood by the rapid growth in implementation of systems on a single chip (SoCs). Instead of fabricating discrete components industries are preferring production
