ttl: add switch desc section

Closes #20.
Closes #22.

2118-2128.tex

@@ -19,6 +19,7 @@
 \usepackage{tikz}
 \usepackage{pgfplots}
 \usepackage{circuitikz}
+\usepackage{pifont}
 \usetikzlibrary{calc}
 \usetikzlibrary{fit,backgrounds} 
 
@@ -395,6 +396,32 @@ All specifications are in $0\degree C \leq T_A \leq 70\degree C$ unless otherwis
 
 \newpage
 
+\section{Configuring IO Direction \& Termination}
+The termination and IO direction can be configured by switches.
+The per-channel termination and per-bank IO direction switches are found at the middle-left and middle-right of both cards respectively.
+
+Termination switches selects the termination of each channel, between high impedence (OFF) and 50\textOmega~(ON).
+
+IO direction switches partly decides the IO direction of each bank.
+\begin{itemize}
+    \itemsep0em
+    \item Closed switch (ON) \\
+          Fix the corresponding bank to output. The direction cannot be changed by I\textsuperscript{2}C.
+    \item Opened switch (OFF) \\
+          Leave the direction configurable by I\textsuperscript{2}C.
+\end{itemize}
+
+\begin{figure}[hbt!]
+    \centering
+    \subfloat[\centering BNC-TTL]{{
+        \includegraphics[height=1.5in]{bnc_ttl_switches.jpg}
+    }}%
+    \subfloat[\centering SMA-TTL]{{
+        \includegraphics[height=1.5in]{sma_ttl_switches.jpg}
+    }}%
+    \caption{Position of switches}%
+\end{figure}
+
 \section{Example ARTIQ code}
 The sections below demonstrate simple usage scenarios of the 2118 BNC-TTL/2128 SMA-TTL card with the ARTIQ control system.
 They do not exhaustively demonstrate all the features of the ARTIQ system.
@@ -414,6 +441,8 @@ def run(self):
         delay(500*ms)
 \end{minted}
 
+\newpage
+
 \subsection{Morse code}
 This example demonstrates some basic algorithmic features of the ARTIQ-Python language.
 \begin{minted}{python}
@@ -437,8 +466,6 @@ def run(self):
             delay(700*ms)
 \end{minted}
 
-\newpage
-
 \subsection{Counting rising edges in a 1ms window}
 The channel should be configured as input in both the gateware and hardware.
 
@@ -462,6 +489,8 @@ def run(self):
     print(counts)
 \end{minted}
 
+\newpage
+
 \subsection{Responding to an external trigger}
 One channel needs to be configured as input, and the other as output.
 

2238.tex

@@ -524,6 +524,28 @@ All specifications are in the recommended operating temperature range unless oth
 \end{threeparttable}
 \end{table}
 
+\section{Configuring IO Direction \& Termination}
+The termination and IO direction can be configured by switches.
+The per-channel termination and per-bank IO direction switches are found at the top and middle of the card respectively.
+\begin{multicols}{2}
+Termination switches selects the termination of each channel, between high impedence (OFF) and 50\textOmega~(ON).
+
+IO direction switches partly decides the IO direction of each bank.
+\begin{itemize}
+    \itemsep0em
+    \item Closed switch (ON) \\
+          Fix the corresponding bank to output. The direction cannot be changed by I\textsuperscript{2}C.
+    \item Opened switch (OFF) \\
+          Leave the direction configurable by I\textsuperscript{2}C.
+\end{itemize}
+\columnbreak
+\begin{center}
+    \centering
+    \includegraphics[height=1.8in]{mcx_ttl_switches.jpg}
+    \captionof{figure}{Position of switches}
+\end{center}
+\end{multicols}
+
 \newpage
 \section{Example ARTIQ code}
 The sections below demonstrate simple usage scenarios of the 2245 LVDS-TTL card with the ARTIQ control system.

2245.tex

@@ -443,6 +443,27 @@ All typical values of AC specifications are at $T_A = 25\degree C$, $V_{ID} = 30
 \end{threeparttable}
 \end{table}
 
+\section{Configuring IO Direction \& Termination}
+The IO direction can be configured by switches, which are found at the top of the card.
+\begin{multicols}{2}
+IO direction switches partly decides the IO direction of each bank.
+\begin{itemize}
+    \itemsep0em
+    \item Closed switch (ON) \\
+          Fix the corresponding channel to output. The direction cannot be changed by I\textsuperscript{2}C.
+    \item Opened switch (OFF) \\
+          Leave the direction configurable by I\textsuperscript{2}C.
+\end{itemize}
+\columnbreak
+\begin{center}
+    \centering
+    \includegraphics[height=1.5in]{lvds_ttl_switches.jpg}
+    \captionof{figure}{Position of switches}
+\end{center}
+\end{multicols}
+
+\newpage
+
 \section{Example ARTIQ code}
 The sections below demonstrate simple usage scenarios of the 2245 LVDS-TTL card with the ARTIQ control system.
 They do not exhaustively demonstrate all the features of the ARTIQ system.
@@ -462,8 +483,6 @@ def run(self):
         delay(500*ms)
 \end{minted}
 
-\newpage
-
 \subsection{Morse code}
 This example demonstrates some basic algorithmic features of the ARTIQ-Python language.
 \begin{minted}{python}
@@ -487,6 +506,8 @@ def run(self):
             delay(700*ms)
 \end{minted}
 
+\newpage
+
 \subsection{Counting rising edges in a 1ms window}
 The channel should be configured as input in both the gateware and hardware.
 
@@ -510,8 +531,6 @@ def run(self):
     print(counts)
 \end{minted}
 
-\newpage 
-
 \subsection{Responding to an external trigger}
 One channel needs to be configured as input, and the other as output.