From dfe8529d5489850cdc02f8023cf519b22f9cba53 Mon Sep 17 00:00:00 2001
From: hadeshyp <hadeshyp>
Date: Tue, 29 May 2012 16:33:58 +0000
Subject: [PATCH] *** empty log message ***

---
 trb3/DacProgramming.tex | 17 +++++++++++++++++
 trb3/main.tex           |  3 +++
 trb3/trb3.kilepr        | 40 +++++++++++++++++++++++++++++++---------
 3 files changed, 51 insertions(+), 9 deletions(-)
 create mode 100644 trb3/DacProgramming.tex

diff --git a/trb3/DacProgramming.tex b/trb3/DacProgramming.tex
new file mode 100644
index 0000000..a603b8b
--- /dev/null
+++ b/trb3/DacProgramming.tex
@@ -0,0 +1,17 @@
+
+Programming the DAC for threshold generation is simple: A standard SPI interface takes 32 Bit of data, the device is chainable. A Perl software module cares about the data content, a simple VHDL core outputs the data and controls the CS signal.
+
+The slow-control interface:
+\begin{itemize}
+ \item 32 Bit Data Memory: 0xd800 - 0xd80f, Length register 0xd810 
+ \item Transfer is started when length register (counting 32 Bit words) is written. 
+ \item While busy, the writing to the length register will be ignored and gives back a no-more-data  flag.
+ \item Doing a memory write with 17 words will do the job, should be faster  than two individual accesses
+ \item All data is sent MSB first (Bit 31), Bits 7-0 are the don't-care-Bits of  the DAC. 
+ \item Interface speed: e.g. 12.5 MHz -> max. 40us for 16 chips
+\end{itemize}
+
+The software takes a text file as input (format to be defined) and generates the correct SPI sequence to load and activate the DAC.
+
+
+    
\ No newline at end of file
diff --git a/trb3/main.tex b/trb3/main.tex
index 70382e0..bf6c365 100755
--- a/trb3/main.tex
+++ b/trb3/main.tex
@@ -137,6 +137,8 @@
       \input{TdcDataFormat}
     \subsection{Slow Control Registers}
       \input{TdcSlowControl}
+    \subsection{DAC Programming}
+      \input{DacProgramming}
 
   \clearpage
   \section{GbE Data Read-out}
@@ -148,6 +150,7 @@
     \subsection{Building Blocks}
     \subsection{Slow Control Registers}
 
+
   \clearpage
   \section{uCTS}
     \subsection{Features}
diff --git a/trb3/trb3.kilepr b/trb3/trb3.kilepr
index b102eeb..548f002 100644
--- a/trb3/trb3.kilepr
+++ b/trb3/trb3.kilepr
@@ -4,7 +4,7 @@ img_extIsRegExp=false
 img_extensions=.eps .jpg .jpeg .png .pdf .ps .fig .gif
 kileprversion=2
 kileversion=2.1.0
-lastDocument=Trb3GeneralRemarks.tex
+lastDocument=main.tex
 masterDocument=
 name=trb3
 pkg_extIsRegExp=false
@@ -24,6 +24,14 @@ Indentation Mode=
 Mode=LaTeX
 ReadWrite=true
 
+[document-settings,item:DacProgramming.tex]
+Bookmarks=
+Encoding=UTF-8
+Highlighting=LaTeX
+Indentation Mode=
+Mode=LaTeX
+ReadWrite=true
+
 [document-settings,item:MultiTestAddOn.tex]
 Bookmarks=
 Encoding=UTF-8
@@ -98,6 +106,16 @@ mode=LaTeX
 open=true
 order=7
 
+[item:DacProgramming.tex]
+archive=true
+column=0
+encoding=UTF-8
+highlight=LaTeX
+line=0
+mode=LaTeX
+open=true
+order=9
+
 [item:MultiTestAddOn.tex]
 archive=true
 column=0
@@ -150,10 +168,10 @@ order=2
 
 [item:Trb3GeneralRemarks.tex]
 archive=true
-column=13
+column=0
 encoding=UTF-8
 highlight=LaTeX
-line=5
+line=30
 mode=LaTeX
 open=true
 order=8
@@ -170,10 +188,10 @@ order=1
 
 [item:main.tex]
 archive=true
-column=21
+column=16
 encoding=UTF-8
 highlight=LaTeX
-line=74
+line=140
 mode=LaTeX
 open=true
 order=0
@@ -192,6 +210,10 @@ order=-1
 CursorColumn=0
 CursorLine=0
 
+[view-settings,view=0,item:DacProgramming.tex]
+CursorColumn=0
+CursorLine=0
+
 [view-settings,view=0,item:MultiTestAddOn.tex]
 CursorColumn=0
 CursorLine=1
@@ -213,13 +235,13 @@ CursorColumn=0
 CursorLine=7
 
 [view-settings,view=0,item:Trb3GeneralRemarks.tex]
-CursorColumn=13
-CursorLine=5
+CursorColumn=0
+CursorLine=30
 
 [view-settings,view=0,item:Trb3KnownBugs.tex]
 CursorColumn=0
 CursorLine=13
 
 [view-settings,view=0,item:main.tex]
-CursorColumn=21
-CursorLine=74
+CursorColumn=16
+CursorLine=140
-- 
2.43.0