Home · Documentation; ihi; d – AMBA AXI and ACE Protocol Specification AXI3, AXI4, and AXI4-Lite, ACE and ACE-Lite. First release of V ARM contract references: LEC-PREV ARM AMBA Specification Licence AMBA AXI Protocol Specification. AMBA® AXI4 (Advanced eXtensible Interface 4) is the fourth generation of the AMBA interface specification from ARM®. Xilinx Vivado Design Suite and.

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AXIthe third generation of AMBA interface defined in the AMBA 3 specification, is targeted at high performance, high clock frequency system designs and includes features that make it suitable for high speed sub-micrometer interconnect:. Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest. The key features of the AXI4-Lite interfaces are:.

Please upgrade to a Xilinx. Enables Xilinx to efficiently deliver enhanced native memory, external memory interface and memory controller solutions across all application domains. Forgot your username or smba APB is designed for low bandwidth control accesses, for example register interfaces on system peripherals. Performance, Area, and Power. Views Read Edit View history.

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Computer buses System on a chip. Key features of the protocol are:. The AMBA specification defines an on-chip communications standard for designing high-performance embedded microcontrollers. Includes standard models protcol checkers for designers to use Interface-decoupled: Consolidates broad array of interfaces into one AXI4so users only need to know one family of interfaces Makes integrating IP from different domains, as well as developing your own or 3rd party partner IP easier Saves design effort because AXI4 IP are already optimized for the highest v20., maximum throughput and lowest latency.


The AXI4 protocol is an update to AXI3 which is designed to enhance the performance and utilization of the interconnect when used by multiple masters.

AMBA AXI Protocol Specification

Supports single and multiple data streams using the same set of shared wires Supports multiple data widths within the same interconnect Ideal for implementation in FPGAs. The AXI4-Stream protocol is designed for unidirectional data transfers from master to slave with greatly reduced signal routing.

A simple transaction on the AHB consists of an address phase and a subsequent data phase without wait states: Ready for adoption by customers Standardized: From Wikipedia, the free encyclopedia. Retrieved from ” https: All interface subsets use the same transfer protocol Fully specified: Since its inception, the scope of AMBA has, despite its name, gone far beyond microcontroller devices. Supports both memory mapped and streaming type interfaces Provides a unified interface on IP across communications, video, embedded and DSP functions Is easy to use, with features like automatic pipeline instantiation to help you more easily hit a specific performance target Is equal to or better than current solutions in key attributes, such as fMAX, LUT usage, latency, and bandwidth.

This subset simplifies the design for a bus with a single master. Xilinx users will enjoy a wide range of speification with the transition to AXI4 as a common user interface for IP. AXI4-Lite is a subset of the AXI4 protocol intended for communication with simpler, smaller control register-style interfaces in components.

The interconnect is decoupled from the interface Extendable: It facilitates development of specificatjon designs with large numbers of controllers and peripherals with a bus architecture.

AXI4 is open-ended to support future needs Additional benefits: Tailor the interconnect to meet system goals: Enables you to build the most compelling products for specifcation target markets. An important aspect of a SoC is not only which components or blocks it houses, but also how they interconnect.


These protocols are today the de facto standard for embedded processor bus architectures because they are well documented and can be used without royalties.

Advanced Microcontroller Bus Architecture – Wikipedia

By using this site, you speciffication to the Terms of Use and Privacy Policy. The timing aspects and the voltage levels on the bus are not dictated by the specifications. AMBA is a solution for the blocks to interface with each other. It includes the following enhancements:.

Access to the target device is controlled through a MUX non-tristatethereby admitting bus-access to one bus-master at a time. Support for burst lengths up to beats Quality of Service signaling Support for multiple region interfaces AXI4-Lite AXI4-Lite is a subset of specirication AXI4 protocol intended for communication with simpler, smaller control register-style interfaces in components.

Technical and de facto standards for wired computer buses. It includes the following specifiaction It is supported by ARM Limited with wide cross-industry participation. The key features of the AXI4-Lite interfaces are: We have detected your current browser version is not the latest one.

This bus has an address and data phase similar to AHB, but a much reduced, low complexity signal list for example no bursts.

Key features of the protocol are: All transactions have a burst length of one All data accesses are the same size as the width of the data bus Exclusive accesses are not supported AXI4-Stream The AXI4-Stream protocol is designed for unidirectional data transfers from master to slave with greatly reduced signal routing.