4 Operation
There are two different ways of presenting the control signals in the trace list,
either grouped like "Size"/"Cycle"/"Status", or as individual (single) signals
like "DS0*", "DTACK*" etc. The grouped presentation form is best suited for
state (synchronous) sampling, with the values shown as mnemonic-s, while the
individual signal presentation is recommended if timing (asynchronous)
sampling is used together with a trace list, with values shown as ones and zeros.
(Refer to description of the command ' F o r m a t / Tr a c e S i g n a l s ' groups
in the chapter "COMMANDS REFERENCE, Trace Display menu".)
Signal selection
The default VBT-325 trace display will show a selection of signals and signal
groups in the trace list that are most relevant for the selected target bus.
However, since most busses will contain more signals/groups than there is
space for on the screen, the user can see other signals by horizontal scrolling
(just as in the Event Pattern window). Similarly, the user can also insert or
delete signals/groups, as well as reorganize the signals/groups by using the
<INS>/<DEL> keys.
<DEL>
/
'ABS'
Typing <DEL> when the cursor is placed in a signal field will cause the
DELETE dialog box to appear. This allows you to delete the signal field
column from the trace list window. This causes the signal/field to appear in the
list of unused signals presented when INSERT is performed.
<INS> / ' ^ N ' T y p i n g <INS> when the cursor is placed in a signal field will cause the
INSERT dialog box to appear. This allows you to insert a new signal group as a
field column in the trace list window.
Horizontal scrolling
To see signal fields that are not present on the screen, horizontal scrolling takes
place when the cursor is "moved beyond" the last signal field on the screen.
However, signal fields to the left of the divider marker 'I' in the headline will
not move when the cursor is moved beyond the screen border. This allows
certain fields to stay locked on the screen, while others can be scrolled "behind"
the locked part. If some signal fields are scrolled behind the locked part, the
divider marker changes from 'I' to '<'. Similarly, a'>' at the rightmost position
in the headline indicates that there are more fields available "outside" the screen
at right. This is illustrated under Event Patterns.
Waveforms
Waveforms are provided to show the logic level of individual signals
graphically as a function of time. This is particularly useful to show timing
relations between different signals for hardware analysis. Busses may be
presented as a "ladder", with the value of the bus at the cursor position shown
in hex value within the window. The ladder will contain a "step" when the bus
changes value. The individual signals in a bus can also be selected, see below.
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Содержание VBAT-PB
Страница 15: ...x i v 1 1 I 1 1 I I i i I I 1 I I 1 I 1 I I ...
Страница 23: ...1VBT 325 Product overview 8 V B T 3 2 5 User s Manual V M E T R O ...
Страница 125: ...8 Trace examples 110 V B T 3 2 5 User s Manual V M E T R O ...
Страница 144: ...9 VBAT PB VME bus anomaly trigger ITP40 I GND VMETRO V B T 3 2 5 User s Manual 1 2 9 ...
Страница 159: ...1 1Jumper settings 144 V B T 3 2 5 User s Manual V M E T R O ...
Страница 181: ...16 Simulator for PC 166 V B T 3 2 5 User s Manual V M E T R O ...