This book is for the AMBA APB Protocol Specification. Intended audience. This book is written for hardware and software engineers who want. to design modules that conform to the AMBA specification. Organization purpose of AMBA AHB or APB protocol descriptions is defined. interconnect specification for the purpose of connecting and managing functional The APB is the member of the AMBA 3 protocol family which implements a.

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APB does not support Write Strobe. By disabling cookies, some features of the site will not work. In this case, the slave data may be overwritten or corrupted.

Signal transitions are sampled at the rising edge of the clock to enable the integration of APB peripherals easily into any design flow. JavaScript seems to be disabled in your browser.

AMBA APB Protocol Specification

It is supported by ARM Limited with wide cross-industry participation. APB is designed for low bandwidth control accesses, for example register interfaces on system peripherals. APB is a non-bursting interface.

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It facilitates development of multi-processor designs with large numbers of controllers and peripherals with a bus architecture. This page was last edited on 28 Novemberat Error responses are returned to the master. We have done our best to make all the documentation and resources available on specifucation versions of Internet Explorer, but vector image support and the layout may not be optimal.

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

You should then connect the slave side of the bridge to any high speed interface and connect the master side of the bridge to the APB slaves. 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. 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:.

As a workaround, you can group PSELx, and then send the packet to the slave directly. From Wikipedia, the free encyclopedia. We recommend upgrading your browser. Views Read Edit View history. This subset simplifies the design for a bus with a single master.

Advanced Microcontroller Bus Architecture – Wikipedia

Therefore, when you connect a narrower transaction to a wider APB slave, the slave cannot determine which byte lane to write.

An important aspect of a SoC is not only which components or blocks it houses, but also how they interconnect. Access to the target device is controlled through a MUX non-tristatethereby admitting bus-access to one bus-master at a time. If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled. Since its inception, the scope of AMBA has, despite its name, gone far beyond microcontroller devices.

We appreciate your feedback. You can use APB to interface to peripherals which are low-bandwidth and do not require the high performance of a pipelined bus interface. Interfaces are listed by their speed in the roughly ascending order, so the interface orotocol the end of each section should be the fastest.

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The AMBA specification defines an on-chip communications standard for designing high-performance embedded microcontrollers. Retrieved from ” https: This site uses cookies specificatiom store information on your computer.

AMBA APB Protocol Specification v2.0

When connecting a wider master to a narrower Xpecification slave, the width adapter converts the wider transactions to a narrower transaction to fit the APB slave data width. Important Information for the Arm website. These protocols are today the de facto standard for embedded processor bus architectures because they are well documented and can be used without royalties.

You must have JavaScript enabled in your browser to utilize the functionality of this website. A simple transaction on the AHB consists of an address phase and a subsequent data ambx without wait states: Technical documentation is available as a PDF Download.

By continuing to use our site, you consent to our cookies. Technical and de facto standards for wired computer buses. Over the next few months we will be adding more developer resources and prrotocol for all the products and technologies that ARM provides.

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APB Advanced Peripheral Bus interface is optimized for minimal power consumption and reduced interface complexity. Was this page helpful?