\documentclass[a4paper,12pt,oneside,pdflatex,italian,final,twocolumn]{article}

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\usepackage{booktabs}
\usepackage{fancyhdr}

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\usepackage[margin=0.5in]{geometry}
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\usepackage{libertine}
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\title{ BH1750FVI }
\author{ Nick Felker }
\date{ 2020 }

\begin{document}

\pagestyle{fancy}

\lhead{ Nick Felker }
\chead { 2020 }
\rhead{ BH1750FVI v0.1.0 }


\onecolumn


\begin{figure}
\begin{minipage}{0.47\textwidth}

\section{Overview}
    Rohm Light Sensor
    \begin{itemize}
        \item Device addresses:
          35,
          92
        \item Address type 7-bit
    \end{itemize}


\end{minipage}
\hfill

\end{figure}


\section{Register Description}
\begin{itemize}
\item Continously H-Resolution Mode2 - Start measurement at 0.5lx resolution. Typically 120ms.
\item Continuously H-Resolution Mode - Start measurement at 1lx resolution. Typically 120ms.
\item Continuously L-Resolution Mode - Start measurement at 4lx resolution. Typically 16ms.
\item One Time H-Resolution Mode2 - Start measurement at 0.5lx resolution. Typically 120ms.
Power Down after measurement.

\item One Time H-Resolution Mode - Start measurement at 1lx resolution. Typically 120ms.
Power Down after measurement.

\item One Time L-Resolution Mode - Start measurement at 4lx resolution. Typically 16ms.
Power Down after measurement.

\item Power Down - No active state
\item Power On - Waiting for measurement command
\item Reset - Reset data register value. Not accepted in Power Down mode.
\end{itemize}

\section{Technical specification}
\centering
\begin{tabular}{lcrr}
\toprule
 & Register Name & Register Address & Register Length \\
\midrule
ContinuousHRes2Mode & Continously H-Resolution Mode2 & 17 & 0 \\
ContinuousHResMode & Continuously H-Resolution Mode & 16 & 0 \\
ContinuouslyLResMode & Continuously L-Resolution Mode & 19 & 0 \\
OnceHRes2Mode & One Time H-Resolution Mode2 & 33 & 0 \\
OnceHResMode & One Time H-Resolution Mode & 32 & 0 \\
OnceLResMode & One Time L-Resolution Mode & 35 & 0 \\
PowerDown & Power Down & 0 & 0 \\
PowerOn & Power On & 1 & 0 \\
Reset & Reset & 7 & 0 \\
\bottomrule
\end{tabular}


\raggedright

\section{Functions}

\centering
\begin{tabular}{lc}
\toprule
  & Description \\
\midrule
_lifecycle & Sends a POWER ON cmd to device \\
command & Things you can do to device \\
read & Read light intensity from device \\
\bottomrule
\end{tabular}


\raggedright
\subsection{Function _lifecycle }
Sends a POWER ON cmd to device \\

\centering
\begin{tabular}{lcr}
\toprule
  & Inputs & Return \\
\midrule
Begin &
&
void
\\
\bottomrule
\end{tabular}



\raggedright
\subsection{Function command }
Things you can do to device \\

\centering
\begin{tabular}{lcr}
\toprule
  & Inputs & Return \\
\midrule
PowerDown &
&
void
\\
Reset &
&
void
\\
\bottomrule
\end{tabular}



\raggedright
\subsection{Function read }
Read light intensity from device \\

\centering
\begin{tabular}{lcr}
\toprule
  & Inputs & Return \\
\midrule
LightIntensity &
&
intensity
\\
\bottomrule
\end{tabular}



\raggedright

\end{document}