Configuration PROMs have no specific requirements unique to Tandem Configuration. However, to meet the 100 ms specification, you must select a PROM that meets the following three criteria:
- Supported by AMD configuration.
- Sized appropriately for both stage 1 and stage 2; that is, the PROM must be able to
contain the entire bitstream.
- For Tandem PROM, both stage 1 and stage 2, are stored here; this bitstream is slightly larger (4-5%) than a standard bitstream.
- For Tandem PCIe, the bitstream size is typically about 1 MB, but this can vary slightly due to design implementation results, device selection, and effectiveness of compression.
- Meets the configuration time requirement for PCI Express based on the first-stage bitstream size and the calculations for the bitstream loading time. See Calculating Bitstream Load Time for Tandem.
See the UltraScale Architecture Configuration User Guide (UG570).