diff options
Diffstat (limited to '')
| -rw-r--r-- | tex/vhdl.tex | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/tex/vhdl.tex b/tex/vhdl.tex index 1c9cabc..1c03873 100644 --- a/tex/vhdl.tex +++ b/tex/vhdl.tex @@ -297,14 +297,14 @@ begin -- sequential statements end process; \end{lstlisting} -Processes have a \emph{sensitivity list} that could also be empty. When a -signal in the sensitivity list changes state, the process is executed. In the -case of an empty sensitivity list, the process runs continuously. In the -declaration, everything from \S\ref{sec:declarations} applies. For the -sequential statements, the following applies: +Processes have a \emph{sensitivity list} that can be empty. When a signal in +the sensitivity list changes state, the process is executed. With an empty +sensitivity list, the process runs continuously. In the declaration, +everything from \S\ref{sec:declarations} applies. For the sequential +statements, the following applies: \begin{itemize} - \item Neither selective (\vhdl{with}) nor conditional (\vhdl{when}) should be used, - as there because there are new sequential constructs (\vhdl{if} and \vhdl{case}). + \item Neither selective (\vhdl{with}) nor conditional (\vhdl{when}) should be used. + They are replaced with new sequential constructs (\vhdl{if} and \vhdl{case}). \item Signal assignments (with \vhdl{<=}) change their value \emph{only at the end of the process}. \item Variables on the other hand change as soon as they are assigned (with \vhdl{:=}). @@ -337,8 +337,7 @@ case `\reqph{expression}` is end case; \end{lstlisting} -Processes can detect \emph{events} of signals. Typically this is used for -clocks. +Processes can detect \emph{events} of signals. Typically it is used for clocks. \begin{lstlisting}[language=vhdl] process (clk) begin |