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Еще лучше пройдитесь по Learning Capture.
Выдержка из хелпа:
Bus names and aliases have the form X[m..n].X represents the "basename" (how you think of the bus, perhaps).
m..n represents the range of signals carried by the bus.
Note that m may be less than or greater than n: both A[0..3] and A[3..0] are valid bus aliases. You can use two periods (..), a colon (:), or a dash (-) to separate m and n.Capture ignores any spaces between the basename and the left bracket ([). For example, ADDR[0..31], ADDR [0:31], and ADDR [0-31] represent the same bus.
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A bus name must have the form basename[x..y] where x..y specifies a range of decimal integers representing the signal numbers of bus members. There are (y - x + 1) wires in the bus. You can use two periods (..), a colon (:), or a dash (-) between m and n.
Examples:
ADDR[0..31] (32 members)
DATA[16:31] (16 members)
CONTROL[4-1] (4 members)
A[100..190] (91 members)
Собственно, для присвоения имени используется кнопка N1 (Place net alias), в диалоговое окно вводится имя шины, по приведенным выше правилам. Единственное - могу добавить, что Bus Entry command (Place menu) я не использую - там какая-то кривизна.
E-mail: 
info@telesys.ru
