Quartus

Group MSB <name><number> overrides BIT0 = LSB in actual or default Options Statement

CAUSE:

In a group range in a Text Design File (.tdf), you specified bits in ascending order. The first bit shown in the group range is always the MSB of the group, regardless of the setting in the Options Statement in the TDF. Therefore, the specified lowest numbered bit in the group is the MSB, even though one of the following conditions exists:

  • In the Options Statement in the TDF, you used the BIT0 option BIT0 = LSB, which specifies the lowest numbered bit in the group as the LSB.

  • You did not use an Options Statement in the TDF. In this situation, the Compiler treats the TDF as if it contains an Options Statement with the BIT0 option BIT0 = LSB.
ACTION: If you want the lowest numbered bit in the group to be the LSB, specify the bits in the group range in descending order. If you want the lowest numbered bit in the group to be the MSB and you want to avoid receiving this message in the future, perform one of the following actions:

  • Change the LSB setting in the existing Options Statement to MSB or ANY.

  • Add an Options Statement that contains BIT0 = MSB or BIT0 = ANY to the TDF.

See also:

Defining Groups
Group Ranges & Subranges
Groups

- PLDWorld -

 
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