Category: Quartus® Prime / Quartus® II
Tools: Quartus® Prime / Quartus® II (Qsys)
device:-


The differences between the Avalon Streaming (Avalon-ST) interface and the Avalon Memory Mapped (Avalon-MM) interface can be summarized as follows:

Avalon-MM interface
Similar to memory access, it has a basic configuration of address lines and a data bus, and handles bidirectional data. It is also used for management purposes as a system bus connected to multiple peripherals.
 
Avalon-ST interface
It is used as an addressless structure to transfer unidirectional streaming data from a data source to a data sink with low latency.

The Avalon-MM interface is mainly used for control systems, and the Avalon-ST interface is mainly used for data processing systems.

Reference information
https://docs.altera.com/r/docs/683091/22.3/avalon-interface-specifications/introduction-to-the-avalon-interface-specifications