cts data structure

diff --git a/cts.tex b/cts.tex
index 6f7360b09035bc42854dd83ec902d3957574955a..fbfda33bdb152629f86b46472f57a765efd11fa3 100644 (file)
--- a/cts.tex
+++ b/cts.tex
@@ -134,9 +134,59 @@ For the time being "old" logic of the CTS is not removed.
 \item[0xA0CA] Tables of 8 EB IDs (each ID has four bits), the IDs are switched form CA(3 down to 0) to CA(7 down to 4) ... CB(31 down to 28)
 \item[0xA0CB] Tables of 8 EB IDs (each ID has four bits) 
 
+\end{description}  
+
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+\subsubsection{CTS Data structure}
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+When there is trigger type which is not equal 0x9 (MDC calibration trigger sent each second) then the data from CTS contains 5 (4 for current data structure) data words.
+When there is MDC calibration trigger CTS sends also scalers information.
+
+\begin{description}
+\item[1 Standard hub word] When hub is used, currently without this (readout through etrax)
+\item[2 First header of the data] the same as for the timing detectors (Start,TOF ...)
+\item[3 Second header] 
+  \begin{description}
+    \item[bit 31 -- 16] Data version 
+    \item[bit 15 -- 0] Number of extension words
+  \end{description}
+\item[4 Latches]
+  \begin{description}
+    \item[bit 0] Start
+    \item[bit 1] Veto
+    \item[bit 2] TOF/RPC multiplicity 1
+    \item[bit 3] TOF/RPC multiplicity 2
+    \item[bit 4] TOF/RPC multiplicity 3
+    \item[bit 5] TOF/RPC multiplicity 4
+    \item[bit 6] TOF/RPC multiplicity 5
+    \item[bit 7] TOF/RPC multiplicity 6
+    \item[bit 8] TOF/RPC multiplicity 2 no neigbour
+    \item[bit 9] TOF/RPC multiplicity 3 no neighbour
+    \item[bit 10] TOF/RPC multiplicity 2 opposite sectors
+    \item[bit 11] Physical trigger (PT) 1 (definition depends on the beam time) 
+    \item[bit 12] PT 2 
+    \item[bit 13] PT 3
+    \item[bit 14] PT 4
+    \item[bit 31 -- 15] All 0
+  \end{description}
+\item[5 Currently empty] 
+\item[13 -- 6 Start scalers]
+\item[21 -- 14 Veto scalers]
+\item[27 -- 22 TOF scalers]
+\item[33 -- 28 RPC scalers]
+\item[37 -- 34 PT scalers]
+\item[38 Start OR scaler]
+\item[39 Veto OR scaler]
+\item[43 -- 40 PT delayed scalers] 
+\item[52 -- 44 Multiplicity scalers]  The same order as for latches
+
 
 \end{description}  
 
+
+
 \begin{figure}
   \centering
   \includegraphics[width=.9\textwidth]{cts_doc.pdf}