The AXI to APB Bridge translates an AXI bus transaction (read or write) to an APB bus transaction. This is accomplished via two state machines – one governing the AXI transactions, and one governing APB transactions.
The AXI to APB Bridge acts as an AXI Slave component, and an APB Master component in an AXI/APB subsystem. Typically, the AXI to APB Bridge has its AXI interface connected to a Slave component port on an AXI Channel/Interconnect module, and its APB interface connected to the Master component port on an APB Channel module.
