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\documentclass[border=2pt]{standalone}
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\usepackage{tikz}
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\usetikzlibrary{chains, scopes}
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\begin{document}
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%% https://tex.stackexchange.com/questions/719622/tikz-for-reproduceable-hex-random-numbers
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\ExplSyntaxOn
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%\sys_gset_rand_seed:n {2000}   % un-comment for cross run consistency
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\seq_new:N \l_olStckEx_hex_seq
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% Next line not needed in newer distributions
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\cs_generate_variant:Nn \seq_put_right:Nn {Ne}
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\NewDocumentCommand{\hexgen}{m} {
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    \int_step_inline:nn {#1} {
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        \int_set:Nn \l_tmpa_int {\int_rand:nn {0}{255}}
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        \int_compare:nNnTF {\l_tmpa_int} < {16}
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        {\tl_set:Nn \l_tmpa_tl {0\int_to_Hex:n {\l_tmpa_int}}}
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        {\tl_set:Nn \l_tmpa_tl {\int_to_Hex:n {\l_tmpa_int}}}
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        \seq_put_right:Ne \l_olStckEx_hex_seq {\l_tmpa_tl}
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}}
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\NewDocumentCommand{\gethex}{m}{\seq_item:Nn \l_olStckEx_hex_seq {#1+1}}
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\ExplSyntaxOff
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\hexgen{19}
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\let\randHexBytes\gethex
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\newcommand{\randHexWord}[1]{\gethex{#1+0}\,\gethex{#1+1}\,\gethex{#1+2}\,\gethex{#1+3}}
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\begin{tikzpicture}[
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    font=\sffamily,
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    node distance = 0mm and 20mm,
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    start chain = R going below,
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    N/.style = {draw,fill=yellow!20,
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                minimum height=5mm,
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                outer sep=0pt, text opacity=1, align=center}
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  ]
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  \begin{scope}[nodes=on chain=D]
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    \tikzset{
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        minimum width={width("0xAA BB CC DD")+2pt}
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    }
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    \foreach \r in {0,1,...,15}{
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        \ifnum\r<7
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            \node[on chain=R, N] {\texttt{0x\randHexWord{\r}}};
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        \else
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            \ifnum\r=9
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                \node[on chain=R, N, text=blue] {\texttt{0xAA}};
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            \else
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                \node[on chain=R, N] {\texttt{0x\randHexWord{\r}}};
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            \fi
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        \fi
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    }
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  \end{scope}
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  \node[above] at (R-1.north west) {MSB};
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  \node[above] at (R-1.north east) {LSB};
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  %% check the persistent random numbers during latex run, eg.g line #3
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  \node[N] at (R-16) {\#3: \texttt{\texttt{0x\randHexWord{3}}}};
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\end{tikzpicture}
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\end{document}
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