Answers Database
F1.5 Symbol Editor, XBLOX: Illegal bus format [0:0]
Record #5045
Product Family: Software
Product Line: Aldec
Product Part: Foundation Schematic Capture
Product Version: 1.5
Problem Title:
F1.5 Symbol Editor, XBLOX: Illegal bus format [0:0]
Problem Description:
Urgency: Standard
General Description:
When using an XBLOX bus which goes through a level of hierarchy,
it is necessary to label the pin on the user's symbol with the [0:0]
bus indices, i.e. DATA[0:0]. However, with F1.5, the Symbol Editor
will not allow you to save the symbol with a bus pin name of 1 bit
like this. This used to work with earlier versions of Foundation.
This is necessary when the user is using XBLOX with the XACTStep6
project type.
Solution 1:
To workaround this issue, the XBLOX needs to be converted to a
regular bus before going through the hierarchy, and then in the
lower level schematic, you'll also need to convert it back from a
regular bus to an xblox bus. Therefore, the bus pin will have the
width defined by the regular bus. To convert an XBLOX bus to a
regular bus, or vice-versa, use the BUS_IFxx XBLOX library symbols.
Please refer to the XBLOX reference guide for details.
End of Record #5045 - Last Modified: 11/23/98 13:05 |
