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\section{Development model}
The workflow for the development is show in figure
\ref{fig:gajski-kuhn-ychart}. In the Gajski-Kuhn Y-model has 3 axis for the
perspectives of the product. It is typical to start from the behavioral axis,
by treating the systems as a black-box, and then to jump back and forth between
the other axis while gravitating towards the origin (project goal).
\begin{figure}[h]
\centering
\resizebox{\linewidth}{!}{
\begin{tikzpicture}[
font=\ttfamily,
]
\draw[gray] node[
circle,
fill = gray,
minimum size = 2mm,
outer sep = 0,
inner sep = 0,
] (O) at (0,0) {};
\foreach \r/\desc in {
1/{Electrical},
2/{Logic gates},
3/{Register transfer},
4/{Architecture},
5/{System}
}{
\draw[gray, dashed] (O) circle (\r);
\draw[gray] (90:\r)
node[
above = 1mm,
align = center,
font = \small\ttfamily,
fill = white,
] {\desc};
}
\draw[red, thick] (O) to ++(30:6)
node[
above = 3mm,
align = center,
text width = 2cm
] {\textbf{Structural Perspective}};
\foreach \r/\desc in {
1/{Transistors, Wires},
2/{Gates, Latches, Flip-Flops},
3/{ALUs, Registers, Memories},
4/{Subblocks},
5/{Top blocks, I/O}
} {
\draw[red] (30:\r)
node[
circle, minimum size = 2mm,
fill = red,
outer sep = 0,
inner sep = 0
] {}
node[
below right = 2mm,
align = left,
font = \small\ttfamily,
fill = white,
] {\desc};
}
\draw[blue, thick] (O) to ++(150:6)
node[
above = 3mm,
align = center,
text width = 2cm
] {\textbf{Behavioral Perspective}};
\foreach \r/\desc in {
1/{Transfer functions},
2/{Truth tables, State graphs},
3/{Data moves and operations},
4/{Subtasks},
5/{Algorithm}
} {
\draw[blue] (150:\r)
node[
circle, minimum size = 2mm,
fill = blue,
outer sep = 0,
inner sep = 0
] {}
node[
below left = 2mm,
align = right,
font = \small\ttfamily,
fill = white,
] {\desc};
}
\draw[green!60!black, thick] (O) to ++(270:6)
node[
below = 3mm,
align = center,
text width = 2cm
] {\textbf{Physical Perspective}};
\foreach \r/\desc in {
1/{Mask polygons, Detailed layout},
2/{Standard cells, Macro cells},
3/{Placement and routing},
4/{Floorplan partitioning},
5/{Chip or board}
} {
\draw[green!60!black] (270:\r)
node[
circle, minimum size = 2mm,
fill = green!60!black,
outer sep = 0,
inner sep = 0
] {}
node[
right = 2mm,
align = left,
font = \small\ttfamily,
fill = white,
] {\desc};
}
\end{tikzpicture}
}
\caption{
Gajski-Kuhn Y-chart.
\label{fig:gajski-kuhn-ychart}
}
\end{figure}
%% TODO: finish picture
\iffalse
Figure \ref{fig:asic-design-flow} shows a typical flow diagram of how an ASIC device
is designed.
\begin{figure}[h]
\begin{tikzpicture}[
scale = .7,
font = \small\ttfamily,
bubble/.style = {
rectangle,
draw = black, thick,
fill = lightgray!10,
align = center,
text width = 2.1cm,
rounded corners = 5pt,
},
box/.style = {
rectangle,
draw = black, thick,
fill = lightgray!10,
align = center,
text width = 2.1cm,
},
lib/.style = {
rectangle,
draw = black, gray, thick, dashed,
fill = lightgray!10,
align = center,
text width = 2.1cm,
},
ghost/.style = {
outer sep = 0,
inner sep = 0,
}
]
\matrix[row sep = 5mm, column sep = 5mm]{
\node[bubble] (dd) {Design Description}; & & \node[bubble] (tbd) {Testbench Description}; \\
\node[ghost] (A) {}; & \node[box] (fs) {Functional Simulation}; \\
\node[box] (so) {Synthesis \& Optimization}; & \node[lib] (se) {Standard Elements}; \\
\node[ghost] (lineA) {}; & & \node[ghost] (lineB) {}; \\
\node[box] (tm) {Technology Mapping}; \\
\node[box] (ts) {Test Synthesis}; \\
\node[bubble] (gates) {}; & \node[box] (pres) {Prelayout Simulation}; \\
\node[box] (l) {Layout}; & \node[box] (posts) {Postlayout Simulation}; \\
\node[bubble] (design) {}; & & \node[lib] {Technology Library}; \\
};
\end{tikzpicture}
\caption{
Design flow for an ASIC device.
\label{fig:asic-design-flow}
}
\end{figure}
\fi
% \section{Hardware}
|
