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In 2010, a new revision of AMBA, AMBA4, defined the AXI4, AXI4-Lite and AXI4-Stream protocols. AXI is royalty-free and its specification is freely available from ARM. AMBA AXI specifies many optional signals, which can be included depending on the specific requirements of the design, [3] making AXI a versatile bus for numerous applications.
In its second version, AMBA 2 in 1999, Arm added AMBA High-performance Bus (AHB) that is a single clock-edge protocol. In 2003, Arm introduced the third generation, AMBA 3, including Advanced eXtensible Interface (AXI) to reach even higher performance interconnect and the Advanced Trace Bus (ATB) as part of the CoreSight on-chip debug and trace ...
AXI or variation, may refer to: Automated X-ray inspection; Advanced eXtensible Interface of ARM for Advanced Microcontroller Bus Architecture (AMBA) AXI car, a right-hand-drive version of the DMC DeLorean; Aeron International Airlines (ICAO airline code: AXI), see List of airline codes (A) Axitinib (PDB code AXI)
Automated X-ray inspection (AXI) is a technology based on the same principles as automated optical inspection (AOI). It uses X-rays as its source, instead of visible light , to automatically inspect features, which are typically hidden from view.
ARM (stylised in lowercase as arm, formerly an acronym for Advanced RISC Machines and originally Acorn RISC Machine) is a family of RISC instruction set architectures (ISAs) for computer processors. Arm Holdings develops the ISAs and licenses them to other companies, who build the physical devices that use the instruction set.
A bus functional model (BFM), also known as a transaction verification model (TVM) is a non-synthesizable software model of an integrated circuit component having one or more external buses.
Signal levels depend entirely on the chips involved. And while the baseline SPI protocol has no command codes, every device may define its own protocol of command codes. Some variations are minor or informal, while others have an official defining document and may be considered to be separate but related protocols.
Arbiters break ties. Like a flip-flop circuit, an arbiter has two stable states corresponding to the two choices.If two requests arrive at an arbiter within a few picoseconds (today, femtoseconds) of each other, the circuit may become meta-stable before reaching one of its stable states to break the tie.