Cascading I3C Hubs is a design technique used to expand the number of connected devices, increase signal reach, and manage complex bus topologies in next-generation server and data center architectures. By connecting the downstream (target) port of one hub to the upstream (controller) port of another, developers can build an I3C Hub Network that supports high-density device environments while maintaining the standard's 12.5 MHz performance. 

This blog introduces how to Testing I3C Hub Cascade based on Tower I3C Host Adapter:

Testing I3C Hub Cascade based on Tower I3C Host Adapter