Many of the levels are shown pictorially in the Gajski/Kuhn chart. Although VHDL does not support system description at the physical/geometry level of. Historical Perspective: Gajski and Kuhn’s Y-chart. • In Gajski and Kuhn’s Y- chart, each axis represents a view of a model: behavioral, structural, or physical view. Gajski-Kuhn chart – also known as Y-chart represents 3 views of a hardware design model. I am not sure how much this is applied practically. A good practice in.

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Daniel Gajski and Robert Kuhn developed it in InRobert Walker and Donald Thomas refined it. According to this model, the development of hardware is perceived within three domains that are depicted as three axis and produce a Y.

Gajski and Kuhn’s Y Chart

Along these axis, the abstraction levels that describe the degree of abstraction. The outer shells are generalisations, the inner ones refinements of the same subject.


The issue in hardware development is most often a top-down design problem. This is perceived by the three domains of behaviour, structure, and the layout that goes yy to more detailed abstraction levels.

The designer can select one of the perspectives and then switch from one view to another. Generally, the design process is not following a specific sequence in this diagram.

Gajski-Kuhn Y-chart | TikZ example

From Gjski, the free encyclopedia. On the system levelbasic properties of an electronic system are determined. For the behavioural description, block diagrams are used by making abstractions of signals and their time response. Blocks used in the structure domain are CPUsmemory chipetc. The algorithmic level is defined by the definition of concurrent algorithms signals, loops, variables, assignments. In the structural domain, blocks like ALUs are in use.

Gajski and Kuhn’s Y Chart

The register-transfer level RTL is a more detailed abstraction level on which the behaviour between communicating registers and logic units is described. Here, data structures and gajeki flows are defined.


In the geometric view, the design step of the floorplan is located. The logical level is described in the behaviour perspective by boolean equations. In the structural view, this is displayed with gates and flip-flops. In the geometric domain, the logical level is gajskk by standard cells.

The behaviour of the circuit level is described by mathematics using differential equations or logical equations. This corresponds to transistors and capacitors up to crystal lattices. Retrieved from ” https: Computer engineering Gxjski design automation Diagrams.

Example: Gajski-Kuhn Y-chart

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