Logical Decoupling in the NoC - 2024.2 English - UG909

Vivado Design Suite User Guide: Dynamic Function eXchange (UG909)

Document ID
UG909
Release Date
2024-12-13
Version
2024.2 English

If the boundary falls within the NoC, NoC quiescing is automatic only if the NMU/NSU is inside the RP. If the NoC/PL AXI interface is at the RP boundary, a logical decoupler is still required. In such a case, it is recommended to put the interface NoC in the RP to avoid the use of the AXI decoupler. Then the connection across partitions is no longer AXI-based but based on the NoC internal path through INI.

Although NoC quiescing occurs automatically and allows you to bypass IP that uses PL, such as the DFX AXI Shutdown Manager or DFX Decoupler, you must oversee AXI transactions to and from the RP during reconfiguration. Outstanding AXI transactions across DFX partitions during reconfiguration can lead to NoC timeout errors at NMU or NSU in the static domain. Additionally, prolonged delays on ready signals are identified by NMU/NSU, potentially causing AXI handshake timeouts. You can examine the NMU/NSU interrupt status register (ISR) to assess if the interrupt register based on timeouts is high.