This Answer Record shows how to migrate the SPI-4.2 Core from v7.3 to v7.4, and describes the signal changes made to the core. Every attempt was made to keep constraints, input, and output signals consistent between versions. This Answer Record covers those modifications required to upgrade from v7.3 to v7.4.
The following sections are included:
- Core Signal Changes
- Wrapper File Changes
- UCF File Changes
- Dynamic Alignment Implementation Considerations
Core Signal Changes
The following signal was added to the v7.4 Sink Core:
- SnkDPAFailed (Output): This signal indicates phase alignment has failed at the end of the alignment sequence.
The following signal was added to the v7.4 Source Core:
- SrcOofOverride (Input): When this signal is asserted, the Source Core behaves as if in-frame and sends data on TDat regardless of the status received on TStat. This signal is used for system testing and debugging.
For more information, see the User Guide.
Wrapper File Changes
The v7.4 wrapper file replaces the v7.3 wrapper file.
UCF File Changes
The UCF file must be updated by replacing all SPI-4.2 constraints in the UCF file with SPI-4.2 constraints provided in the v7.4 release.
Dynamic Alignment Implementation Considerations
The Sink user interface contains one input and two output signals that are used for dynamic alignment. The usage of the PhaseAlignRequest signal has been changed. For more information on dynamic alignment implementation considerations, see the User Guide.