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Advanced EXtensible Interface
The Advanced eXtensible Interface (AXI), is an on-chip communication bus protocol developed by ARM. It is part of the Advanced Microcontroller Bus Architecture 3 (AXI3) and 4 (AXI4) specifications. AXI has been introduced in 2003 with the AMBA3 specification. In 2010, a new revision of AMBA, AMBA4, defined the AXI4, AXI4-Lite and AXI4-Stream protocol. 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, making AXI a versatile bus for numerous applications. While the communication over an AXI bus is between a single initiator and a single target, the specification includes detailed description and signals to include N:M interconnects, able to extend the bus to topologies with more initiators and targets. AMBA AXI4, AXI4-Lite and AXI4-Stream have been adopted by Xilinx and many of its partners as main communication buses in their products. Threa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ARM Holdings
Arm is a British semiconductor and software design company based in Cambridge, England. Its primary business is in the design of ARM processors (CPUs). It also designs other chips, provides software development tools under the DS-5, RealView and Keil brands, and provides systems and platforms, system-on-a-chip (SoC) infrastructure and software. As a "holding" company, it also holds shares of other companies. Since 2016, it has been owned by Japanese conglomerate SoftBank Group. While ARM CPUs first appeared in the Acorn Archimedes, a desktop computer, today's systems include mostly embedded systems, including ARM CPUs used in virtually all smartphones. Systems such as iPhones and Android smartphones frequently include many chips, from many different providers, that include one or more licensed Arm cores, in addition to those in the main Arm-based processor. Arm's core designs are also used in chips that support all the most common network-related technologies. Processors ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Privilege (computing)
In computing, privilege is defined as the delegation of authority to perform security-relevant functions on a computer system. A privilege allows a user to perform an action with security consequences. Examples of various privileges include the ability to create a new user, install software, or change kernel functions. Users who have been delegated extra levels of control are called privileged. Users who lack most privileges are defined as unprivileged, regular, or normal users. Theory Privileges can either be automatic, granted, or applied for. An automatic privilege exists when there is no requirement to have permission to perform an action. For example, on systems where people are required to log into a system to use it, logging out will not require a privilege. Systems that do not implement file protection - such as MS-DOS - essentially give unlimited privilege to perform any action on a file. A granted privilege exists as a result of presenting some credential to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Master/slave (technology)
Master/slave is a model of asymmetric communication or control where one device or process (the "master") controls one or more other devices or processes (the "slaves") and serves as their communication hub. In some systems, a master is selected from a group of eligible devices, with the other devices acting in the role of slaves. The ''master/slave'' terminology was first used in 1904. Since the early 21st century, the terms have become a subject of controversy from their association with slavery and some organizations have opted to replace them with alternative terms. Examples * In electronics, master/slave relationships are used to describe some of the following scenarios: ** In parallel ATA hard drive arrangements, the terms master and slave are used to describe drives on the same cable, but neither drive has control or priority over the other. ** A master clock that provides time signals used to synchronize one or more slave clocks as part of a clock network. ** In AXI ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wishbone (computer Bus)
The Wishbone Bus is an open source hardware computer bus intended to let the parts of an integrated circuit communicate with each other. The aim is to allow the connection of differing cores to each other inside of a chip. The Wishbone Bus is used by many designs in the OpenCores project. Wishbone is intended as a "logic bus". It does not specify electrical information or the bus topology. Instead, the specification is written in terms of "signals", clock cycles, and high and low levels. This ambiguity is intentional. Wishbone is made to let designers combine several designs written in Verilog, VHDL or some other logic-description language for electronic design automation (EDA). Wishbone provides a standard way for designers to combine these hardware logic designs (called "cores"). Wishbone is defined to have 8, 16, 32, and 64-bit buses. All signals are synchronous to a single clock but some slave responses must be generated combinatorially for maximum performance. Wishbone per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Interoperability
Interoperability is a characteristic of a product or system to work with other products or systems. While the term was initially defined for information technology or systems engineering services to allow for information exchange, a broader definition takes into account social, political, and organizational factors that impact system-to-system performance. Types of interoperability include syntactic interoperability, where two systems can communicate with each other, and cross-domain interoperability, where multiple organizations work together and exchange information. Types If two or more systems use common data formats and communication protocols and are capable of communicating with each other, they exhibit ''syntactic interoperability''. XML and SQL are examples of common data formats and protocols. Lower-level data formats also contribute to syntactic interoperability, ensuring that alphabetical characters are stored in the same ASCII or a Unicode format in all the commun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Processor Register
A processor register is a quickly accessible location available to a computer's processor. Registers usually consist of a small amount of fast storage, although some registers have specific hardware functions, and may be read-only or write-only. In computer architecture, registers are typically addressed by mechanisms other than main memory, but may in some cases be assigned a memory address e.g. DEC PDP-10, ICT 1900. Almost all computers, whether load/store architecture or not, load data from a larger memory into registers where it is used for arithmetic operations and is manipulated or tested by machine instructions. Manipulated data is then often stored back to main memory, either by the same instruction or by a subsequent one. Modern processors use either static or dynamic RAM as main memory, with the latter usually accessed via one or more cache levels. Processor registers are normally at the top of the memory hierarchy, and provide the fastest way to access data. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subset
In mathematics, Set (mathematics), set ''A'' is a subset of a set ''B'' if all Element (mathematics), elements of ''A'' are also elements of ''B''; ''B'' is then a superset of ''A''. It is possible for ''A'' and ''B'' to be equal; if they are unequal, then ''A'' is a proper subset of ''B''. The relationship of one set being a subset of another is called inclusion (or sometimes containment). ''A'' is a subset of ''B'' may also be expressed as ''B'' includes (or contains) ''A'' or ''A'' is included (or contained) in ''B''. A ''k''-subset is a subset with ''k'' elements. The subset relation defines a partial order on sets. In fact, the subsets of a given set form a Boolean algebra (structure), Boolean algebra under the subset relation, in which the join and meet are given by Intersection (set theory), intersection and Union (set theory), union, and the subset relation itself is the Inclusion (Boolean algebra), Boolean inclusion relation. Definition If ''A'' and ''B'' are sets and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AXI Write Transaction
AXI or ''variation'', may refer to: * Automated X-ray inspection * Advanced eXtensible Interface of ARM for Advanced Microcontroller Bus Architecture (AMBA) * AXI car, the 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) * AxiCorp GmbH, a German pharmaceutical company, subsidiary of Biocon * S55 Axi Expressway, see List of Regional Expressways of China * Axi ( zh, 阿希村), Qaka, Xinjiang, China; a village * Axi Township ( zh, 阿西乡), Zoigê County, Ngawa, Sichuan, China; see List of township-level divisions of Sichuan * Axi language, a Loloish language spoken by the Yi people * Axi Stachowitsch (1918–2013), Austrian-Russian academic * Robert Axi, 15th century Member of Parliament in England * "axi-", a term pertaining to axis; see List of Greek and Latin roots in English/A–G See also * Capsicum axi (''C. axi''), a species of chilli * Trilobodrilus axi (''T. ax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AXI Read Transaction
AXI or ''variation'', may refer to: * Automated X-ray inspection * Advanced eXtensible Interface of ARM for Advanced Microcontroller Bus Architecture (AMBA) * AXI car, the 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) * AxiCorp GmbH, a German pharmaceutical company, subsidiary of Biocon * S55 Axi Expressway, see List of Regional Expressways of China * Axi ( zh, 阿希村), Qaka, Xinjiang, China; a village * Axi Township ( zh, 阿西乡), Zoigê County, Ngawa, Sichuan, China; see List of township-level divisions of Sichuan * Axi language, a Loloish language spoken by the Yi people * Axi Stachowitsch (1918–2013), Austrian-Russian academic * Robert Axi, 15th century Member of Parliament in England * "axi-", a term pertaining to axis; see List of Greek and Latin roots in English/A–G See also * Capsicum axi (''C. axi''), a species of chilli * Trilobodrilus axi (''T. ax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FIFO (computing And Electronics)
Representation of a FIFO queue In computing and in systems theory, FIFO is an acronym for first in, first out (the first in is the first out), a method for organizing the manipulation of a data structure (often, specifically a data buffer) where the oldest (first) entry, or "head" of the queue, is processed first. Such processing is analogous to servicing people in a queue area on a first-come, first-served (FCFS) basis, i.e. in the same sequence in which they arrive at the queue's tail. FCFS is also the jargon term for the FIFO operating system scheduling algorithm, which gives every process central processing unit (CPU) time in the order in which it is demanded. FIFO's opposite is LIFO, last-in-first-out, where the youngest entry or "top of the stack" is processed first. A priority queue is neither FIFO or LIFO but may adopt similar behaviour temporarily or by default. Queueing theory encompasses these methods for processing data structures, as well as interactions between s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burst Mode (computing)
Burst mode is a generic electronics term referring to any situation in which a device is transmitting data repeatedly without going through all the steps required to transmit each piece of data in a separate transaction. Advantages The main advantage of burst mode over single mode is that the burst mode typically increases the throughput of data transfer. Any bus transaction is typically handled by an arbiter, which decides when it should change the granted master and slaves. In case of burst mode, it is usually more efficient if you allow a master to complete a known length transfer sequence. The total delay in a data transaction can be typically written as a sum of initial access latency plus sequential access latency. :\ t_ = t_ + t_ Here the sequential latency is same in both single mode and burst mode, but the total initial latency is decreased in burst mode, since the initial delay (usually depends on FSM for the protocol) is caused only once in burst mode. Hence the tot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AXI Bursts
AXI or ''variation'', may refer to: * Automated X-ray inspection * Advanced eXtensible Interface of ARM for Advanced Microcontroller Bus Architecture (AMBA) * AXI car, the 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) * AxiCorp GmbH, a German pharmaceutical company, subsidiary of Biocon * S55 Axi Expressway, see List of Regional Expressways of China * Axi ( zh, 阿希村), Qaka, Xinjiang, China; a village * Axi Township ( zh, 阿西乡), Zoigê County, Ngawa, Sichuan, China; see List of township-level divisions of Sichuan * Axi language, a Loloish language spoken by the Yi people * Axi Stachowitsch (1918–2013), Austrian-Russian academic * Robert Axi, 15th century Member of Parliament in England * "axi-", a term pertaining to axis; see List of Greek and Latin roots in English/A–G See also * Capsicum axi (''C. axi''), a species of chilli * Trilobodrilus axi (''T. ax ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
