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authorWerner Almesberger <werner@almesberger.net>2016-12-30 19:36:34 (GMT)
committerWerner Almesberger <werner@almesberger.net>2016-12-30 19:36:34 (GMT)
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tree0130d8fe041be585157fca12bbf8ec3b89913874
parent1326857a55116a97c6d8440256fa8215df455f63 (diff)
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iox/iox.tex: define point of view for signal types; bump date
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1 files changed, 4 insertions, 1 deletions
diff --git a/iox/iox.tex b/iox/iox.tex
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--- a/iox/iox.tex
+++ b/iox/iox.tex
@@ -39,7 +39,7 @@ Werner Almesberger%
\footnote{Specification details and illustrations.}
%~\url{<werner@almesberger.net>}
}
-\date{December 28, 2016}
+\date{December 30, 2016}
\begin{document}
\phantomsection\pdfbookmark{Neo900 IO Expanders}{firstpage}
@@ -527,6 +527,9 @@ connect either to an IO expander or the CPU. The names of function blocks
and signals are those used in the Neo900 block diagram \cite{BD} unless
noted otherwise. Signal names are given for block diagram and schematics.
+Signal types are as seen by the CPU or IO expander, i.e., an ``input''
+is a signal sent from a peripheral towards the CPU.
+
We classify speed requirements in the following thee categories:
\begin{description}
\item[slow] for signals that can tolerate latencies in the order of