4 Operation
BR* and IRQ* format
As with all active low signals, a '0' is typed to indicate true and a '11to indicate
false. This is also true for the four Bus Request signals (BR3-0*) and the seven
Interrupt Request signals (IRQ7-1*). However, the value shown when leaving
the field is the
number
of the actual request signal if a '0' was typed
(true), and a
dot':
if a '1' was typed (false).
The motivation for this is to get a very good readability of active
request signals in the alphanumeric trace list display while keeping a
consistent presentation both in the Event patterns and the Trace display.
Address/Data attributes
Note:
Typing <CR> in a address or
data field in event patterns
will bring up a dialog box that
will give the options in the
field at the cursor position.
The options may include NOT, Range, 64-bit or binary representation.
Binary details
It is possible to specify don't care bits down the bit level by using the <Binary
details> option in the dialog box.
Example:
Not
64-bit
xxXxXXX (1XXO )
is true when bit 3 is one and the least significant bit is zero..
NOT can be specified with address and data values by ticking the "[X] Not"
button in the signal dialog box that appears when <CR> is typed in a field. This
results in a'!' shown before the value/mnemonic. It is also possible to type '!'
directly in front of the value/mnemonic.
There are some restrictions when you use NOT together with an addressldata
that includes "don't care" bits. For legal combinations see the Negate help
screen. To get the help screen press H (Help). Then press N (Next) until you get
the help screen 'Help - Negate'. To leave the help system press X (eXit).
For use in VME64 applications, the VBT-325 allows 64-bit addresses or data to
be specified in the event patterns. Since VME64 is a multiplexing of the
VMETRO
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User's Manual
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Summary of Contents for VBAT-PB
Page 15: ...x i v 1 1 I 1 1 I I i i I I 1 I I 1 I 1 I I ...
Page 23: ...1VBT 325 Product overview 8 V B T 3 2 5 User s Manual V M E T R O ...
Page 125: ...8 Trace examples 110 V B T 3 2 5 User s Manual V M E T R O ...
Page 144: ...9 VBAT PB VME bus anomaly trigger ITP40 I GND VMETRO V B T 3 2 5 User s Manual 1 2 9 ...
Page 159: ...1 1Jumper settings 144 V B T 3 2 5 User s Manual V M E T R O ...
Page 181: ...16 Simulator for PC 166 V B T 3 2 5 User s Manual V M E T R O ...