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doc: Add pulse counters, timetagging, manual pulse trigger, thermometer

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doc/cern-title.tex
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......@@ -9,7 +9,7 @@
\noindent \rule{\textwidth}{.1cm}
\hfill August 12, 2014
\hfill August 29, 2014
\vspace*{3cm}
......
doc/conv-common-gw.bib
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......@@ -74,3 +74,14 @@
year = 2011,
note = {\url{http://opencores.org/websvn,filedetails?repname=sockit_owm&path=%2Fsockit_owm%2Ftrunk%2Fdoc%2Fsockit_owr.pdf}}
}
@misc{ds18b20,
author = {{Maxim Integrated}},
title = {{DS18B20 -- Programmable Resolution 1-Wire Digital Thermometer}},
note = {\url{http://datasheets.maximintegrated.com/en/ds/DS18B20.pdf}}
}
@misc{wbgen2,
title = {{Wishbone Slave Generator}},
howpublished = {\url{http://www.ohwr.org/projects/wishbone-gen/wiki}}
}
doc/conv-common-gw.tex
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......@@ -61,6 +61,9 @@
\hline
05-08-2014 & 0.1 & First draft \\
12-08-2014 & 1.0 & First release \\
29-08-2014 & 2.0 & Added sections for input pulse counters, time-tagging,
manual pulse triggering, one-wire thermometer module, the switches
on the converter boards, and changed and corrected some wording \\
\hline
\end{tabular}
}
......@@ -85,6 +88,7 @@ FPGA & Field-Programmable Gate Array \\
LSR & Line Status Register \\
MSWR & Multicast Switch Register \\
SR & Status Register \\
WRPC & White Rabbit PTP Core \\
\end{tabular}
\addcontentsline{toc}{section}{List of abbreviations}
......@@ -197,7 +201,7 @@ Table~\ref{tbl:switches} summarizes the switches on converter boards.
General-purpose & Eight switches that \textit{should} be implemented on all converter boards.
Read their state from the SR.SWITCHES field (see Appendix~\ref{app:conv-regs-sr}) \\
Other & Dedicated switches for specific converter boards.
Read their state from the OSWR register \newline
y Read their state from the OSWR register
(see Appendix~\ref{app:conv-regs-oswr}) \\
\hline
\end{tabular}
......@@ -284,13 +288,22 @@ By default, the reset time is set to 100~ms.
The channel logic is presented in Figure~\ref{fig:chan-logic}. The central part
thereof is a pulse generator which can be configured for pass-through mode, or
fixed-width pulse generation with subsequent pulse rejection after a pulse has
been generated. The generator is triggered by the pulse input, which can be fed
directly to the generator's input, or optionally glitch filtered, by a switch
on the converter board. The output of this pulse generator triggers lighting a pulse LED,
apart from driving the pulse output of the module.
been generated. The generator can be triggered in two ways:
\begin{figure}[b]
\centerline{\includegraphics[width=\textwidth]{fig/chan-logic}}
\begin{itemize}
\item by the pulse input, which can be fed directly to the generator's input,
or optionally glitch filtered (the selection is done by means of a general-purpose
switch)
\item manually, through commands sent by a user via the I$^2$C and ultimately Wishbone bus
\end{itemize}
The output of this pulse generator triggers lighting a pulse LED,
apart from driving the pulse output of the module. Input pulses also trigger
the incrementing of a pulse counter, as well as the storage of a timestamp to a dedicated
FIFO memory.
\begin{figure}[h]
\centerline{\includegraphics[width=1.1\textwidth]{fig/chan-logic}}
\caption{\label{fig:chan-logic} Channel logic diagram}
\end{figure}
......@@ -311,8 +324,8 @@ output enables are set one clock cycle later. This in combination with the
rest of the circuitry outside the FPGA makes sure no glitches or erroneous pulses
are output during the internal reset period.
An example connection of the output enables on the CONV-TTL-RS485~\cite{conv-ttl-rs485-ohwr} is shown in
Figure~\ref{fig:outp-enable}.
An example connection of the output enable signals on the CONV-TTL-RS485~\cite{conv-ttl-rs485-ohwr}
is shown in Figure~\ref{fig:outp-enable}.
\begin{figure}
\centerline{\includegraphics[width=\textwidth]{fig/outp-enable}}
......@@ -326,7 +339,7 @@ Figure~\ref{fig:outp-enable}.
The glitch filter input (\textit{gf\_en\_n\_i}) is intended to be enabled via one
of the general-purpose switches on the converter board when the environment where
the board is placed is hazardouse and can potentially create harmful glitches on the
the board is placed is hazardous and can potentially create harmful glitches on the
line. It is active-low, therefore a '0' on the pin enables the glitch filter.
The length of the glitch filter can be selected at top-level via the generic
......@@ -335,6 +348,152 @@ The length of the glitch filter can be selected at top-level via the generic
For information on the module's implementation, consult its documentation in the
\textit{ip\_cores/general-cores/doc/} folder.
%------------------------------------------------------------------------------
\subsection{Pulse counter}
\label{subsec:pulse-cnt}
%------------------------------------------------------------------------------
Figure~\ref{fig:pulse-cnt} presents the implementation of the pulse counters.
When a pulse arrives on either the TTL or blocking side, it is resynchronized
in the 20~MHz clock domain and passed through a rising edge detector. When
a rising edge occurs on the pulse, the counter is incremented by one and stored
to the channel pulse counter register (CHxPCR -- see Appendix~\ref{app:conv-regs})
register.
The pulse counter register can be written via the \textit{conv\_regs} component as a
result of an I$^2$C write access to the register's address.
\begin{figure}[h]
\centerline{\includegraphics[width=\textwidth]{fig/pulse-cnt}}
\caption{Pulse counter implementation}
\label{fig:pulse-cnt}
\end{figure}
%------------------------------------------------------------------------------
\subsection{Time-tagging mechanism}
\label{subsec:pulse-timetag}
%------------------------------------------------------------------------------
The architecture of the pulse time-tagging mechanism is shown in Figure~\ref{fig:timetag-arch}.
The time-tagging mechanism is clocked from the 125~MHz clock domain. Input pulses trigger the storage
to a ring buffer of either internally-generated timestamps, or precise timestamps from the White
Rabbit network. Four tag buffer (TB*) registers point to the latest sample in the buffer and
allow for reading the buffer entirely. Since the ring buffer is shared between the channels, the latest timestamp
for a specific channel is available in the latest timestamp registers for the channel.
Finally, the current value of TAI time can be read from dedicated registers.
\begin{figure}[h]
\centerline{\includegraphics[width=1\textwidth]{fig/timetag-arch}}
\caption{\label{fig:timetag-arch} Pulse time-tagging architecture}
\end{figure}
%------------------------------------------------------------------------------
\subsubsection{Time-tagging controller}
\label{subsec:pulse-timetag-ctrl}
%------------------------------------------------------------------------------
The architecture of the time-tag controller is shown in Figure~\ref{fig:timetag-core}.
The time-tag controller contains two counters used for counting time
as well as logic for multiplexing between internally and externally generated timestamps.
The two counters implemented are:
\begin{itemize}
\item \textit{cycles counter} -- count the number of clock cycles to one second
\item \textit{TAI counter} -- count full seconds
\end{itemize}
The TAI counter can be loaded with a new value by writing the TVLR and TVHR registers
(see Appendix~\ref{app:conv-regs-tvlr} and~\ref{app:conv-regs-tvhr}). A load of either
of these registers will reset the internal cycles counter.
Note that due to the synchronization logic, rising edge detector and the latching of the
ORed pulse rising edge detection signal, a timestamp is stored to the time-tag buffer
two to three cycles after its actual arrival on the input (Figure~\ref{fig:timetag-delay}).
The same delay applies to the latest timestamp registers.
\pagebreak
\begin{figure}[h]
\centerline{\includegraphics[width=\textwidth]{fig/timetag-core}}
\caption{\label{fig:timetag-core} Time-tagging controller architecture}
\vspace*{22pt}
\centerline{\includegraphics[width=.8\textwidth]{fig/timetag-delay}}
\caption{\label{fig:timetag-delay} Timestamp storage delay}
\end{figure}
%------------------------------------------------------------------------------
\subsubsection{Ring buffer}
\label{subsec:pulse-timetag-buf}
%------------------------------------------------------------------------------
The implementation of the ring buffer is shown in Figure~\ref{fig:timetag-ring-buf}.
A dual-clock asynchronous FIFO synchronizes data between the read and write clock domains.
Data from the FIFO is stored to the RAM clocked from the read clock domain.
\begin{figure}
\centerline{\includegraphics[width=.8\textwidth]{fig/timetag-ring-buf}}
\caption{Ring buffer implementation}
\label{fig:timetag-ring-buf}
\end{figure}
Figure~\ref{fig:timetag-buf-mech} shows the mechanics of the ring buffer, and helps
better understand the control logic. Note that by listing the converter board registers to
access, the figure is oriented towards converter board designs, but the ring buffer
component is usable in other designs as well.
In few words, the buffer read and write pointers
advance on read or write requests from the buffer. While a read can not be performed if the
buffer is empty, a write to a full buffer will start overwriting old timestamps.
For converter board designs, a caution should be put in place. Because the TBMR
register (see Appendix~\ref{app:conv-regs-tbmr}) causes the read pointer to advance,
it should be the last register read in a readout cycle. Otherwise, the values of the
other tag buffer registers will return the next sample in the tag buffer.
\begin{figure}[h]
\centerline{\includegraphics[width=\textwidth]{fig/timetag-buf-mech}}
\caption{\label{fig:timetag-buf-mech} Ring buffer mechanics}
\end{figure}
%------------------------------------------------------------------------------
\subsubsection{Synchronization issues}
\label{subsec:pulse-timetag-sync}
%------------------------------------------------------------------------------
Apart from the data coming from the faster clock domain into the slower clock domain, where
synchronization is handled by the FIFO insde the ring buffer component (see Figure~\ref{fig:timetag-ring-buf}),
there are three other places where synchronization may be a concern. These places are
shown in Figure~\ref{fig:timetag-sync}, along with the solution to the concern.
Note that although the TAI time signal is generated in the 125~MHz
clock domain, it is not synchronized before connection to the \textit{conv\_regs}.
This is because its rate of change of once per second is considered too slow to present
any problem of synchronization when read by the user.
\begin{figure}[h]
\centerline{\includegraphics[width=\textwidth]{fig/timetag-sync}}
\caption{\label{fig:timetag-sync} Synchronization in the time-tagging logic}
\end{figure}
%------------------------------------------------------------------------------
\subsection{Manual pulse triggering}
\label{subsec:man-trig}
%------------------------------------------------------------------------------
The manual pulse trigger module (\textit{conv\_man\_trig}) is implemented in the form
of a simple state machine, which is shown in Figure~\ref{fig:man-trig}. The module
is directly connected to the register load output of the \textit{conv\_regs} module,
and a register load signal from the latter triggers the FSM. If the value sent via
the register to the module are part of the expected value in the password, the FSM
advances. Otherwise, the FSM returns to the IDLE state and the sequence must be re-commenced.
The FSM waits in each state indefinitely for a value to be input.
\begin{figure}[h]
\centerline{\includegraphics[width=.7\textwidth]{fig/man-trig-fsm}}
\caption{\label{fig:man-trig} FSM of the manual pulse trigger module}
\end{figure}
%------------------------------------------------------------------------------
\subsection{Pulse generator}
\label{subsec:pulse-gen}
......@@ -359,15 +518,16 @@ duty cycle (1/\textit{g\_pgen\_duty\_cycle\_div}).
\end{figure}
In this latter case, a finite-state machine (FSM) handles pulse generation and rejection.
Its general operation is shown in
Its general operation is shown in Figure~\ref{fig:pulse-gen-operation}.
The operation of the pulse generator depends on whether the glitch filter is enabled.
If it is, then the pulse is assumed to be synchronized externally to the \textit{conv\_pulse\_gen}
block and it trigger input triggers the FSM directly. Alternatively, if the glitch filter
is disabled, the trigger input starts the pulse (to avoid glitches on the leading edge)
and then the pulse is synchronized and the FSM triggered to generate the fixed-width pulse.
After the pulse width has been reached, the FSM resets the input flip-flop and goes into the
rejection state.
If this is enabled, then the pulse is synchronized externally to the \textit{conv\_pulse\_gen}
block and it triggers the FSM directly. Alternatively, if the glitch filter is disabled, the trigger
input starts the pulse (to avoid glitches on the leading edge) and then the pulse is synchronized and the
FSM triggered to generate the fixed-width pulse. After the pulse width has been reached, the FSM resets
the input flip-flop and goes into the rejection state.
If any pulses arrive either during the generation state, or the rejection state, the error output
is set high for one clock cycle.
\begin{figure}
\centerline{\includegraphics[width=\textwidth]{fig/pulse-gen-operation}}
......@@ -422,9 +582,10 @@ for signaling communication.
%==============================================================================
The \textit{conv\_regs} module contains various Wishbone-addressable registers that contain status information,
as well as select control functionality. It is the module which constrains \textit{conv\_common\_gw}
to a maximum of six pulse repetition channels, due to need of compatibility with previously-released
implementations of the \textit{conv\_regs} memory map.
as well as select control functionality. The module was generated using \textit{wbgen2}~\cite{wbgen2}, but has
been adapted to allow for generating the read request to the tag buffer. It is the module which constrains
\textit{conv\_common\_gw} to a maximum of six pulse repetition channels, due to need of relative compatibility
to previously-released implementations of the \textit{conv\_regs} memory map.
Some of the bits in the converter board registers are set from inside the \textit{conv\_common\_gw}
module, but some are status bits that should be connected to external logic. Most of the bits implemented
......@@ -471,7 +632,7 @@ for details on how this is done and which are the fields concerned.
Note that the logic allows less than 6 pulse repetition channels, but not more.
If \textit{g\_nr\_chans < 6}, then the rest of the bits are automatically set to '0',
as in the case a \textit{g\_with\_*} generic is \textit{false}. If \textit{g\_nr\_chans > 6}
as in the case a \textit{g\_with\_*} generic is \textit{false}. If \textit{g\_nr\_chans $>$ 6}
a synthesis error will be thrown.
%==============================================================================
......@@ -483,6 +644,22 @@ The \textit{xwb\_xil\_multiboot} module from the \textit{general-cores} library~
is used to provide MultiBoot functionality via I$^2$C. To find out more about the
module and how to use it, consult its documentation under the \textit{general-cores/doc/} folder.
%==============================================================================
\subsection{One-wire master}
\label{subsec:onewire}
%==============================================================================
Converter boards are expected to contain a DS18B20 thermometer chip~\cite{ds18b20},
which can be used for monitoring the temperature of, and obtaining a unique
identifier for the board.
The one-wire master module provides two registers for software control of the module.
Note that the FPGA does not control the one-wire thermometer lines in any way.
Accessing the thermometer is done through software only.
More details about how to access the one-wire master module can be found in its
documentation~\cite{onewire-core}.
%==============================================================================
% Appendices
%==============================================================================
......@@ -526,7 +703,6 @@ The following sections list the memory map of each peripheral.
%% SUBSEC: conv-regs
%%------------------------------------------------------------------------------
\include{conv-regs}
%\include{tmp}
%------------------------------------------------------------------------------
% SUBSEC: MultiBoot
......
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sodipodi:role="line"
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sodipodi:role="line"
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sodipodi:role="line"
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xml:space="preserve"><tspan
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sodipodi:linespacing="125%"
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y="429.63452"
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xml:space="preserve"><tspan
style="font-size:8px"
y="429.63452"
x="593.50391"
id="tspan4442"
sodipodi:role="line">EMPTY = 1</tspan><tspan
style="font-size:8px"
id="tspan4444"
y="439.63452"
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sodipodi:role="line">FULL = 0</tspan><tspan
id="tspan4446"
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y="449.63452"
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sodipodi:role="line">USEDW = 0</tspan></text>
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sodipodi:linespacing="125%"
id="text4476"
y="62.143356"
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style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="62.143356"
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sodipodi:role="line"
id="tspan4482">Before pulse arrival,</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="75.893356"
x="44.29134"
sodipodi:role="line"
id="tspan4489">or after buffer clear</tspan></text>
<text
xml:space="preserve"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
x="44.29134"
y="185.18987"
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sodipodi:linespacing="125%"><tspan
id="tspan4495"
sodipodi:role="line"
x="44.29134"
y="185.18987"
style="font-size:11px;text-align:end;text-anchor:end">One pulse arrives,</tspan><tspan
sodipodi:role="line"
x="44.29134"
y="198.93987"
style="font-size:11px;text-align:end;text-anchor:end"
id="tspan4499">advancing write</tspan><tspan
sodipodi:role="line"
x="44.29134"
y="212.68987"
style="font-size:11px;text-align:end;text-anchor:end"
id="tspan4648">pointer</tspan></text>
<text
sodipodi:linespacing="125%"
id="text4501"
y="309.20563"
x="30.024872"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
id="tspan4505"
style="font-size:11px;text-align:end;text-anchor:end"
y="309.20563"
x="30.024872"
sodipodi:role="line">Three more pulses</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="322.95563"
x="30.024872"
sodipodi:role="line"
id="tspan4509">arrive, filling up</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="336.70563"
x="30.024872"
sodipodi:role="line"
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xml:space="preserve"
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y="432.28345"
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id="tspan4515"
sodipodi:role="line"
x="-79.724411"
y="432.28345"
style="font-size:10px;text-align:start;text-anchor:start" /></text>
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xml:space="preserve"
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sodipodi:linespacing="125%"><tspan
id="tspan4523"
sodipodi:role="line"
x="37.085419"
y="420.72137"
style="font-size:11px;text-align:end;text-anchor:end">One more pulse arrives,</tspan><tspan
sodipodi:role="line"
x="37.085419"
y="434.47137"
style="font-size:11px;text-align:end;text-anchor:end"
id="tspan4539">one timetag overwritten,</tspan><tspan
sodipodi:role="line"
x="37.085419"
y="448.22137"
style="font-size:11px;text-align:end;text-anchor:end"
id="tspan4541">read pointer advances</tspan><tspan
sodipodi:role="line"
x="37.085419"
y="461.97137"
style="font-size:11px;text-align:end;text-anchor:end"
id="tspan4668">with write pointer</tspan></text>
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sodipodi:linespacing="125%"
id="text4529"
y="178.93987"
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style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="178.93987"
x="434.05515"
sodipodi:role="line"
id="tspan4533">Read from TBMR,</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="192.68987"
x="434.05515"
sodipodi:role="line"
id="tspan4690">advancing read</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="206.43987"
x="434.05515"
sodipodi:role="line"
id="tspan4694">pointer</tspan></text>
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sodipodi:linespacing="125%"><tspan
sodipodi:role="line"
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xml:space="preserve"><tspan
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sodipodi:role="line">EMPTY = 0</tspan><tspan
style="font-size:8px"
id="tspan4567"
y="67.58728"
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sodipodi:role="line">FULL = 1</tspan><tspan
id="tspan4569"
style="font-size:8px"
y="77.58728"
x="593.50391"
sodipodi:role="line">USEDW = 0</tspan></text>
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sodipodi:linespacing="125%"
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style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
id="tspan4579"
style="font-size:11px;text-align:end;text-anchor:end"
y="55.893356"
x="435.87839"
sodipodi:role="line">Read from TBCYR, TBTLR,</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="69.643356"
x="435.87839"
sodipodi:role="line"
id="tspan4590">or TBHR, read pointer</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="83.393356"
x="435.87839"
sodipodi:role="line"
id="tspan4592">does not advance</tspan></text>
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xml:space="preserve"
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sodipodi:linespacing="125%"><tspan
sodipodi:role="line"
x="434.05515"
y="316.42487"
style="font-size:11px;text-align:end;text-anchor:end"
id="tspan4636">Two more TBMR reads</tspan></text>
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id="text4606"
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style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="414.47137"
x="434.05515"
sodipodi:role="line"
id="tspan4610">One more TBMR read,</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="428.22137"
x="434.05515"
sodipodi:role="line"
id="tspan4704">emptying the buffer,</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="441.97137"
x="434.05515"
sodipodi:role="line"
id="tspan4730">any more reads will</tspan><tspan
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x="434.05515"
sodipodi:role="line"
id="tspan4734">not advance the</tspan><tspan
style="font-size:11px;text-align:end;text-anchor:end"
y="469.47137"
x="434.05515"
sodipodi:role="line"
id="tspan4738">read pointer</tspan></text>
<text
sodipodi:linespacing="125%"
id="text4612"
y="71.226364"
x="-115.15748"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle"
y="71.226364"
x="-115.15748"
id="tspan4614"
sodipodi:role="line">1.</tspan></text>
<text
xml:space="preserve"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
x="-115.15748"
y="195.36076"
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sodipodi:linespacing="125%"><tspan
sodipodi:role="line"
id="tspan4618"
x="-115.15748"
y="195.36076"
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle">2.</tspan></text>
<text
sodipodi:linespacing="125%"
id="text4620"
y="319.37653"
x="-115.15748"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle"
y="319.37653"
x="-115.15748"
id="tspan4622"
sodipodi:role="line">3.</tspan></text>
<text
xml:space="preserve"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
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y="443.27362"
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sodipodi:linespacing="125%"><tspan
sodipodi:role="line"
id="tspan4626"
x="-115.15748"
y="443.27362"
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle">4.</tspan></text>
<text
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style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
x="283.46457"
y="71.226364"
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sodipodi:linespacing="125%"><tspan
sodipodi:role="line"
id="tspan4710"
x="283.46457"
y="71.226364"
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle">5.</tspan></text>
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sodipodi:linespacing="125%"
id="text4712"
y="195.36076"
x="283.46457"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle"
y="195.36076"
x="283.46457"
id="tspan4714"
sodipodi:role="line">6.</tspan></text>
<text
xml:space="preserve"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
x="283.46457"
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sodipodi:linespacing="125%"><tspan
sodipodi:role="line"
id="tspan4718"
x="283.46457"
y="319.37653"
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle">7.</tspan></text>
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sodipodi:linespacing="125%"
id="text4720"
y="443.27362"
x="283.46457"
style="font-size:40px;font-style:normal;font-weight:normal;line-height:125%;letter-spacing:0px;word-spacing:0px;fill:#000000;fill-opacity:1;stroke:none;font-family:Sans"
xml:space="preserve"><tspan
style="font-size:18px;font-weight:bold;text-align:center;text-anchor:middle"
y="443.27362"
x="283.46457"
id="tspan4722"
sodipodi:role="line">8.</tspan></text>
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doc/fig/timetag-core.svg 0 → 100644
View file @ a7cd894b
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