PROM Selection - 4.4 English - PG156

UltraScale Devices Gen3 Integrated Block for PCI Express LogiCORE IP Product Guide (PG156)

Document ID
PG156
Release Date
2024-12-06
Version
4.4 English

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:

  1. Supported by AMD configuration.
  2. 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.
  3. 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) for a list of supported PROMs and device bitstream sizes.