logic design with vhdl

... 1 0 1 10 1 0 10 01 00 11 10 A BC C B A F A F = AB' + BC + AC (c) Network with hazard removed C E B A D F 0 1 0 1 10 1 0 10 01 00 11 10 A BC F = AB' + BC 1 - Hazard (a) Network with 1-hazard B D E F 0 ns 10 ns 20 ns 30 ... inversion Figure 1-7 Conversion to NOR Gates (a) AND-OR network (b) Equivalent NOR-gate network 8 VHDL Processes General form of Process process(sensitivity-list) begin sequential-statements end ... (X) Outputs (Z) clock State Figure 1-16 General Model of Mealy Sequential Machine 4 Figure 2-2 VHDL Program Structure Entity Architecture Entity Architecture Module 1 Entity Architecture Module...

Ngày tải lên: 12/12/2013, 09:16

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Ngày tải lên: 01/04/2014, 17:47

Ngày tải lên: 05/04/2014, 23:14

... data without errors that cause retransmission and delays. Cabling and connectivity backed by a reputable vendor with guaranteed error-free performance help avoid poor transmission within ... up to 300 or 550 meters with low cost 850 nm serial applications. 10 Gb/s reliable transmission, design flexibility The Three Principles of Data Center Infrastructure Design Page 4 As networks ... require even more space. With insufficient floor space as the topmost concern among IT managers today, maximizing space resources is the most critical aspect of data center design. Reliability Tier...

Ngày tải lên: 10/12/2013, 03:15

... as the logic synthesis tool, as illustrated in Figure 14-1 . Figure 14-1. Designer's Mind as the Logic Synthesis Tool with varied designer styles for the different blocks in the design ... be redesigned. Thus, redesign was needed to verify what-if scenarios. • Each designer would implement design blocks differently. There was little consistency in design styles. For large designs, ... to logic gates. Instead of trying to perform logic synthesis in their minds, designers can now concentrate on the architectural trade-offs, high-level description of the design, accurate design...

Ngày tải lên: 24/12/2013, 11:17

... initial is not supported % + - modulus unary plus unary minus Logical ! && || logical negation logical and logical or Relational > < >= <= greater than less ... acceptable to the logic synthesis tool. A list of constructs that are typically accepted by logic synthesis tools is given in Table 14-1 . The capabilities of individual logic synthesis tools ... allowed, because equality with x and z does not have much meaning in logic synthesis. While writing expressions, it is recommended that you use parentheses to group logic the way you want it...

Ngày tải lên: 24/12/2013, 11:17

... user. Logic optimization The logic is now optimized to remove redundant logic. Various technology independent boolean logic optimization techniques are used. This process is called logic optimization. ... timing Logic synthesis The RTL description of the magnitude comparator is read by the logic synthesis tool. The design constraints and technology library for abc_100 are provided to the logic ... done internally in the logic synthesis tool and are not visible to the designer. The technology library is given to the designer. Once the technology is chosen, the designer can control only...

Ngày tải lên: 24/12/2013, 11:17

... 14.6.2 Design Partitioning Design partitioning is another important factor for efficient logic synthesis. The way the designer partitions the design can greatly affect the output of the logic ... ] 14.6 Modeling Tips for Logic Synthesis The Verilog RTL design style used by the designer affects the final gate-level netlist produced by logic synthesis. Logic synthesis can produce efficient ... abstraction can cause logic with undesirable structure to be generated by the synthesis tool. Designing at a very low level (e.g., hand instantiation of each cell) causes the designer to lose the...

Ngày tải lên: 24/12/2013, 11:17

... triggered D flip-flop 14.7.6 Design Constraints Timing critical is the only design constraint we used in this design. Typically, design constraints are more elaborate. 14.7.7 Logic Synthesis We synthesize ... we discussed the following aspects of logic synthesis with Verilog HDL: • Logic synthesis is the process of converting a high-level description of the design into an optimized, gate-level ... synthesis tool. • Accurate specification of design constraints is an important part of logic synthesis. High-level synthesis tools allow the designer to write designs at an algorithmic level. However,...

Ngày tải lên: 24/12/2013, 11:17

Ngày tải lên: 01/01/2014, 02:09