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

ARM AMBA 5 AHB Protocol Specification

The AMBA specification defines an on-chip communications standard for designing high-performance embedded microcontrollers. Access to the target device is controlled through a MUX non-tristatethereby admitting bus-access to one bus-master at a time.


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It facilitates development of multi-processor designs with large numbers of controllers and peripherals with a bus architecture. Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest.

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

Retrieved from ” https: This page was last edited on 28 Novemberat This subset simplifies the design for a bus with a single master. 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 sepcification.

ARM AMBA 5 AHB Protocol Specification

Computer buses System on a chip. Technical and de facto standards for wired computer buses. APB is designed for low bandwidth control accesses, for example register interfaces on system peripherals.


It is supported by ARM Limited with wide cross-industry participation. Views Read Edit View history. The timing aspects and the voltage levels on the bus are not dictated by the specifications.

An important aspect of a SoC is not only which components or blocks it houses, but also how they interconnect. This bus has an address and data phase similar to AHB, but a much reduced, low complexity signal list for example no bursts. AMBA is a solution for the blocks to interface with each other. A simple transaction on the AHB consists of an address phase and a subsequent data phase without wait states: