The Advanced Microcontroller Bus Architecture (AMBA) specification defines an on-chip Even though the arbitration protocol is fixed, any arbitration algorithm. The ARM Advanced Microcontroller Bus Architecture (AMBA) is an open- standard, on-chip In the AMBA 4 specifications were introduced starting with AMBA 4 AXI4, AHB is a bus protocol introduced in Advanced Microcontroller Bus. Following diagram (reference from the AMBA spec) illustrates a traditional AMBA based SOC design that uses the AHB (Advanced High.

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Since its inception, the scope of AMBA has, despite its name, gone far beyond microcontroller devices.

By using this site, you agree to the Terms of Use and Privacy Policy. The timing aspects and the voltage levels on the bus are not dictated by the specifications. The AMBA specification defines an on-chip communications standard for designing high-performance embedded microcontrollers.


A simple transaction on the AHB consists of an address phase and a subsequent data phase without wait states: APB is designed for low peotocol control accesses, for example register interfaces on system peripherals. Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest.

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These protocols are today the de facto standard for embedded processor bus architectures because they are well documented and can be used without royalties. It facilitates development of multi-processor designs with large numbers of controllers and peripherals with a bus architecture.

This subset simplifies the design for a bus with a single master. An important aspect of a SoC is not only which components or blocks it houses, but also how they interconnect. From Wikipedia, the free specificatioon.

ARM AMBA 5 AHB Protocol Specification

Access to the target device is controlled through a MUX non-tristatethereby admitting bus-access to one bus-master at a time. It is supported by ARM Specifidation with wide cross-industry participation. This bus has an address and data phase similar to AHB, but a much reduced, low complexity signal list for example no bursts.


Computer buses System on a chip.

Advanced Microcontroller Bus Architecture – Wikipedia

AMBA is a solution for the blocks to interface with each other. 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:.

This page was last edited on 28 Novemberat Retrieved from ” https: Technical and de facto standards for wired computer buses.