Multiboot and Fallback - 1.3 English

UltraScale+ Devices Integrated Block for PCI Express Product Guide (PG213)

Document ID
PG213
Release Date
2023-10-19
Version
1.3 English

Tandem Configuration supports multiboot and fallback capabilities for stage 1 only. For Tandem PROM, even though both stages are delivered in a single programming image, a failure only in stage 1 can trigger a fallback event, as the watchdog timer is disabled when the device becomes active. For Tandem PCIe it is only useful for stage 1, because stage 2 is delivered over the PCIe link. Given that the ultimate goal of Tandem Configuration is endpoint enumeration within 120 ms of power good, the additional time required when using multiboot and fallback strategies can lead to the configuration solution missing this goal.