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The Advanced eXtensible Interface (AXI) is an on-chip communication bus protocol and is part of the Advanced Microcontroller Bus Architecture specification (AMBA). [ 1 ] [ 2 ] AXI had been introduced in 2003 with the AMBA3 specification.
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 ...
Master and Slave Wishbone's interfaces. The Wishbone Bus is an open source hardware computer bus intended to let the parts of an integrated circuit communicate with each other.
Coherent Accelerator Processor Interface (CAPI), is a high-speed processor expansion bus standard for use in large data center computers, initially designed to be layered on top of PCI Express, for directly connecting central processing units (CPUs) to external accelerators like graphics processing units (GPUs), ASICs, FPGAs or fast storage.
The Open Core Protocol (OCP) is a protocol for on-chip subsystem communications. It is an openly licensed, core-centric protocol and defines a bus-independent, configurable interface. OCP International Partnership produces OCP specifications. OCP data transfer models range from simple request-grant handshaking through pipelined request-response ...
The Scalable Coherent Interface or Scalable Coherent Interconnect (SCI), is a high-speed interconnect standard for shared memory multiprocessing and message passing.The goal was to scale well, provide system-wide memory coherence and a simple interface; i.e. a standard to replace existing buses in multiprocessor systems with one with no inherent scalability and performance limitations.
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.
The Runway bus is a front-side bus developed by Hewlett-Packard for use by its PA-RISC microprocessor family. The Runway bus is a 64-bit wide, split transaction, time multiplexed address and data bus running at 120 MHz.