AXI4 (Advanced eXtensible Interface 4) is a protocol used in system-on-chip (SoC) architectures for high-performance connectivity. It is a component of the ARM Advanced Microcontroller Bus Architecture (AMBA) specification, which establishes a number of protocols for tying together different SoC design elements.
AXI4 is created to offer a high-speed, low-latency connection for data communication between various system components. High-performance applications like embedded processors, digital signal processing (DSP), and video processing are well suited to it since it allows burst transfers, numerous open transactions, and low-latency interrupts.
The AXI4 protocol specifies a number of signal lines, including signals for address, data, read/write operations, and response signals that show the transaction’s state, that are used to regulate the data transmission between various components. AXI4 also supports a number of different transaction types, such as memory-mapped, streaming, and message-based transactions.
With support for a variety of system configurations and device kinds, AXI4 is intended to be extremely customizable and expandable. Moreover, it supports hierarchical interconnect topologies, enabling the connection of several AXI4 components to create a bigger system.
AXI4 is a well-liked and commonly utilized protocol for high-performance connectivity in SoC designs overall. High-performance, low-latency applications benefit from its versatile and adjustable interface, which may be tailored to a variety of applications and system settings.
