Configuration Transaction Timeout - 3.3 English

Versal ACAP CPM DMA and Bridge Mode for PCI Express Product Guide (PG347)

Document ID
Release Date
3.3 English

Configuration transactions are non-posted transactions. The AXI Bridge functional mode has a timer for timeout termination of configuration transactions that have not completed on the PCIe link. SLVERR is returned when a configuration timeout occurs. Timeouts of configuration transactions are flagged by an interrupt as well.

Note: Multiple Configuration read (PCIe CFG read) can block Configuration writes (PCIe CFG write). You must have some kind of throttling mechanism for CFG reads so CFG write can pass by.