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% Document Info
\author{Bug Hunter (kamezian)}
\pdfinfo{
  /Title (upf-basics.pdf)
  /Creator (Cheatography)
  /Author (Bug Hunter (kamezian))
  /Subject (UPF basics Cheat Sheet)
}

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\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
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    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
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\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{UPF basics Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{Bug Hunter (kamezian)} via \textcolor{DarkBackground}{\uline{cheatography.com/126408/cs/24454/}}}
\end{tabulary}
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\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}Bug Hunter (kamezian) \\
  \uline{cheatography.com/kamezian} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 26th September, 2020.\\
   Updated 27th September, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
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  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
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\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Power Domain}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{create\_power\_domain}} pd1 & Power domain created at top level scope \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{create\_power\_domain}} pd2 -elements cpu & specify instance name \tn 
% Row Count 5 (+ 3)
% Row 2
\SetRowColor{LightBackground}
{\bf{create\_power\_domain}} pd3 -elements Mem -scope cpu & in relative scope  cpu, exists instance Mem \tn 
% Row Count 8 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{{\bf{set\_domain\_supply\_net}} is required to specify primary power and ground nets for a power domain} \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{set\_domain\_supply\_net}} TOP -primary\_power\_net VDD   -primary\_ground\_net VSS}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Power Switches - MTCMOS Cells}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{create\_power\_switch myswitch -domain Core -input\_supply\_port \{in VDDC\} -output\_supply\_port \{out VDDS \} -control\_port \{Nsleep PMU/sleep\} -on\_state \{on\_state in \{!sleep\} \}}}} \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{Place \& Route later will physically map the constraint to the real switch cells:} \tn 
% Row Count 6 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{map\_power\_switch -domain \textless{}domain\_name\textgreater{} -lib\_cell \textless{}lib\_cell\_name\textgreater{} \textless{}switch\_name\textgreater{}}}} \tn 
% Row Count 8 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Even when not switching,CMOS cells consume leakage power. The idea is to {\bf{save leakage power by truning off design partitions when the logic is inactive}},for that, Power Switches are added between the main supply and the virtual supply to be shutdown. Of course the virtual supply is connected to standard cells supply rails.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.92 cm} x{4.08 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Power Supply Network UPF 1.0}}  \tn
% Row 0
\SetRowColor{LightBackground}
{\bf{create\_supply\_port}} VDD & Creates Port VDD \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
{\bf{create\_supply\_net}} VDD -domain TOP & Creates supply net at top level \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
{\bf{connect\_supply\_net }} VDD -ports VDD & Connects supply net to port VDD \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
{\bf{set\_domain\_supply\_net}} & Specifies primary power/ground nets for power domain \tn 
% Row Count 9 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{create\_supply\_net -reuse}} will create supply net and supply port automatically at child level}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Level Shifters - set\_level\_shifter}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{set\_level\_shifter  LS\_in  -domain  PD2 {\bf{-applies\_to inputs}} {\bf{-rule  high\_to\_low}}   -location  {\bf{self}}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{set\_level\_shifter  LS\_out  -domain  PD2 {\bf{-applies\_to outputs}} {\bf{-rule  low\_to\_high}}   -location  {\bf{parent}}} \tn 
% Row Count 6 (+ 3)
% Row 2
\SetRowColor{LightBackground}
rule can be " high\_to\_low", "low\_to\_high" or "both" & location can be "self", "parent" or "automatic" \tn 
% Row Count 9 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{LS needed when 2 different signals belonging to different voltage power domains need to be connected to ensure proper signal value and timing propagation \newline Level Shifter strategy is {\bf{optional}} since insertion controlled by PST.  \newline LS Strategy can be applied to control the{\bf{location}} of the LS cells}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{ISO \seqsplit{Cells-set\_isolation/set\_isolation\_control}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{set\_isolation}} -applies\_to outputs -location parent} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{set\_isolation}} –no\_isolation –elements \{list\}} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{set\_isolation}} iso\_core\_out -domain Core\_domain -isolation\_power\_net VDDC  -isolation\_ground\_net VSS -clamp\_value 1 -applies\_to outputs} \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{set\_isolation\_control}} iso\_core\_out –domain Core\_domain -isolation\_signal PwrCtrl/isolate\_ctrl      -isolation\_sense low      -location parent} \tn 
% Row Count 10 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Provide protection during shutdown to avoid spurious signal propagation}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.76 cm} p{0.76 cm} p{0.76 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{3}{x{8.4cm}}{\bf\textcolor{white}{Retention FF}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{3}{x{8.4cm}}{{\bf{set\_retention}} RET\_PD1 -domain PD1          -retention\_power\_net  VDDH    -retention\_ground\_net    VSS} \tn 
% Row 1
\SetRowColor{white}
\mymulticolumn{3}{x{8.4cm}}{{\bf{set\_retention\_control}}  RET\_PD1 -domain  PD1        {\bf{-save\_signal }}      \{SAVE   high\}        {\bf{-restore\_signal}}   \{RESTORE   high\}} \tn 
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{3}{x{8.4cm}}{{\bf{map\_retention\_cell}} -domain PD1 {\bf{-lib}}\_cells} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\SetRowColor{LightBackground}
\mymulticolumn{3}{x{8.4cm}}{Retention FF will maintain the state of sequential elements in a shutdown block. \newline Retention supplies must be "Always-ON" as long as the FF need to hold their value}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}---}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Power State Table - PST}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Once you know more about what you are trying to define, specify the design switching characteristics in    a power state table. \newline % Row Count 3 (+ 3)
This requires knowing (or deciding) the operational voltages for each power domain, and the supplies being used. \newline % Row Count 6 (+ 3)
The PST defines clearly {\bf{all legal voltage states and power state combinations}} for a design, hence it becomes the center of the design power intent as it {\bf{captures the  dynamic voltage scaling (DVS/DVFS) and shutdown scenarios}}.% Row Count 11 (+ 5)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{add\_port\_state  \textless{}port\_name\textgreater{} \{-state \{name  \textless{}nom\textgreater{}|\textless{}min nom max\textgreater{}|\textless{}off\textgreater{}\}\}}} \newline {\emph{Defines all possible state information to a supply port}} \newline {\bf{create\_pst \textless{}table\_name\textgreater{} -supplies \{list\}}} \newline {\emph{Creates a PST using a specific order of supply nets}} \newline {\bf{add\_pst\_state \textless{}state\_name\textgreater{} -pst \textless{}table\_name\textgreater{}      -state \textless{}supply\_states\textgreater{}}} \newline {\emph{Defines valid combination of supply net values for each possible state of the design}}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Create Block Level UPF}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{To specify driver supply set on input ports and receiver supply set on output port ,one can use {\bf{set\_port\_attributes}} command(SPA),} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{set\_port\_attributes}} -driver\_supply\_set | -receiver\_supply\_set VDD\_set} \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{To specify supply net on ports if no corresponding supply set is defined, use \seqsplit{set\_related\_supply\_net(SRSN):}} \tn 
% Row Count 8 (+ 3)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{{\bf{ set\_related\_supply\_net}}    –object\_list A –power VDD} \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Idea here is to create boundary power constraints for IO ports of blocks to guide block level implementation. \newline Also when no SRSN/SPA is applied user cn specify default supply to be used to power ports: \newline {\bf{set\_port\_attributes -elements \{ . \}   -attribute \seqsplit{related\_supply\_default\_primary} TRUE}}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Importance of Power State Table}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Recommendation  to use the supply\_net names for create\_pst command to keep PST matrix readable. \newline % Row Count 2 (+ 2)
Power Management cell insertion is based on PST and UPF constraints: \newline % Row Count 4 (+ 2)
{\bf{Level shifter cells are inserted based upon the PST}} \newline % Row Count 6 (+ 2)
{\bf{Isolation cells are inserted based upon the UPF constraints}} \newline % Row Count 8 (+ 2)
{\bf{Retention cells are inserted based on constraints}} \newline % Row Count 10 (+ 2)
Correctness of the design is checked against PST.% Row Count 11 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Always-On Logic}}  \tn
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Some logic needs to stay active during shutdown \newline % Row Count 1 (+ 1)
1-Path to enable pins of ISO/ELS \newline % Row Count 2 (+ 1)
2-Power switches \newline % Row Count 3 (+ 1)
3-Retention registers \newline % Row Count 4 (+ 1)
4-Feedthrough paths \newline % Row Count 5 (+ 1)
Always-on logic remains powered within shutdown block \newline % Row Count 7 (+ 2)
1-Single-rail AO cells \newline % Row Count 8 (+ 1)
2-Dual-rail AO cells% Row Count 9 (+ 1)
} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{PST Example}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/kamezian_1601145528_PST.JPG}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{PST Example}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/kamezian_1601145927_PST2.JPG}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Supply Sets}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{{\bf{create\_power\_domain}} doesn't require the use of {\bf{set\_domain\_supply\_net}} as pre-defined handles  {\bf{primary.power}} and {\bf{primary.ground}} are automatically created. \newline Hence : \newline {\bf{set\_isolation}} doesn't require use of {\bf{-isolation\_power\_net}} or {\bf{-isolation\_ground\_net}} options \newline {\bf{set\_retention}} doesn't require use of {\bf{-rentention\_power\_net}} or {\bf{-retention\_ground\_net}} options \newline  \newline {\bf{set\_isolation}} {\bf{-source}} SS\_VDD1 {\bf{-sink}} SS\_VDD3 -\textgreater{} using source/sink provides finer control for inserting isolation cells to only on ports where the driver supply is related to a given supply set and load supply is related to another supply set. {\bf{Works for only for supply sets}} \newline   \newline {\bf{set\_isolation}} {\bf{-diff\_supply\_only true}} will insert iso cells only for ports where driver and load usea different supply. {\bf{Works for both supply sets and supply nets.}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{0.8 cm} p{0.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Supply Sets - 2 use models}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{{\bf{{\emph{Explicit:}}}} {\bf{create\_supply\_set mySS1    -function \{power myVDD\}   -function \{ground myVSS\} }}} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
\mymulticolumn{2}{x{8.4cm}}{{\bf{{\emph{Implicit:}}}} Supply set handles automatically created with the {\bf{create\_power\_domain}} command} \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Predefined handles are : {\bf{PD1.primary PD1.default\_isolation PD1.default\_retention}}} \tn 
% Row Count 6 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Supply sets provide an {\bf{abstract way of bundling supply nets}} and doing the front-end implementation {\bf{without knowing the supply net and port names}}. Physical net and port information is refined at the back-end. This {\bf{helps}} improve the {\bf{re-usability of your IP since the IP is implemented without the actual nets and ports}} and thus is more portable. \newline {\bf{Complete supply network information is not needed when you do your front end implementation.}}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Supply Set Handles-{\bf{Explicit vs Implicit}}}}  \tn
\SetRowColor{LightBackground}
\mymulticolumn{1}{p{8.4cm}}{\vspace{1px}\centerline{\includegraphics[width=5.1cm]{/web/www.cheatography.com/public/uploads/kamezian_1601157210_supplyset.jpg}}} \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}