An iPort switch ports the interface to transaction requests. The iPorts include the features and functions described in this section to monitor and control the interface.
Inside the interconnect switch, transactions from the iPort are routed to an ePort based on the transaction address. The transaction can pass through sub-switches and a protection unit before exiting the interconnect on an ePort.
iPort AXI Connections
There are several types of AXI interfaces attached to the iPorts:
- Processors and other engines
- Interfaces from the PL
- Interfaces from another interconnect switch
Transactions are hosted by the RPU, APU, DMA units, PL fabric, and the NoC. The host interface connects to an iPort on the interconnect switch. The transaction attributes for each host is summarized in the Transaction Hosts section.
Another Interconnect Switch
An iPort interface is sometimes attached to an ePort from another interconnect switch. This connection is usually a 128-bit AXI interface.