\begin{tikztimingtable}[timing/wscale=2]

%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% My Customized Styles
%%

\tikzset{% Environment Config
    timing/dslope=0.1,
    timing/.style={x=2ex,y=2ex},
    x=2ex,
    timing/rowdist=3ex,
    timing/name/.style={font=\sffamily\scriptsize},
    timing/nodes/advanced,
}

%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%
%% Drawing
%%

\busref{CLK}         & l 17{c}
                       N(C1);[thin,dotted,black!25]8{0.25t};N(C2)
                       10{c} \\
\busref*{FRAME}      & 2u 12l 2h 2u
                       N(F1);[thin,dotted,black!25]8{0.25t};N(F2)
                       u 0.5h2l 4.5h 2u \\
\busref[31::0]{AD}   & 2u 2d{addr} 2u{} 2d{$d_1$} 2d{$d_1 '$} 2d{$d_2$} 4d{$d_3$} 2u
                       N(A1);[thin,dotted,black!25]8{0.25t};N(A2)
                       1.5u 2x 2.5u 2d{$v_i$} 2u \\
\busref*[3::0]{C/BE} & 2u 2d{0010} 12d{BE\#} 2u
                       N(B1);[thin,dotted,black!25]8{0.25t};N(B2)
                       1.5u 2d{0000} 4.5d{\busref*{BE}} 2u \\
\busref*{IRDY}       & 4u 8l 2h2l2h
                       N(I1);[thin,dotted,black!25]8{0.25t};N(B2)
                       3.5u 4.5l 2h \\
\busref*{TRDY}       & 4u HLH 6l 2h
                       N(T1);[thin,dotted,black!25]8{0.25t};N(T2)
                       3.5u 2.5h 2l 2h \\
\busref*{DEVSEL}     & 4u 12l 2h
                       N(D1);[thin,dotted,black!25]8{0.25t};N(D2)
                       5u 0.5h2.5l 0.5h 1.5u \\
%
% there must NOT be an uncommented line before \extracode!
%
\extracode
    \tablerules
%%  \tablegrid
    \begin{pgfonlayer}{background}
        \begin{scope}[semitransparent,semithick]
            \vertlines[darkgray,dotted]{1,3,...,17}
            \vertlines[darkgray,dotted]{21,23,...,\twidth}
        \end{scope}
    \end{pgfonlayer}

%%
%%
%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\end{tikztimingtable}

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