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 is designed for low bandwidth control accesses, for example register interfaces on system peripherals. We recommend upgrading your browser. From Wikipedia, the free encyclopedia. You must have JavaScript enabled in your browser to utilize the functionality of this website.

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APB is a non-bursting interface. Important Information for the Arm website.

Therefore, when you connect a narrower transaction to a wider APB slave, the slave cannot determine which byte lane to write. Interfaces are listed by their speed in the roughly ascending order, so the interface at the end of each section should be the fastest.

An important aspect of a Pprotocol is not only which components or blocks it houses, but spscification how they interconnect. You should then connect the slave side of the bridge to any high speed interface protockl connect the master side of the bridge to the APB slaves.

As a workaround, you can group PSELx, and then send the packet to the slave directly. By using this site, you agree to the Terms of Use and Privacy Policy. In this case, the slave data may be overwritten or corrupted. When connecting a wider master to a narrower APB slave, the width adapter converts the wider transactions to a narrower transaction to fit the APB slave data width.


You can use APB to interface to peripherals which are low-bandwidth and do not require the high performance of a pipelined bus interface.

The timing aspects and the voltage levels on the bus are not dictated by the specifications. Since its inception, the scope of AMBA has, despite its name, gone far beyond microcontroller devices.

It is supported by ARM Limited with wide cross-industry participation. We have done our best to make all the documentation and resources available on old versions of Internet Explorer, but vector image support and the layout may not be optimal. APB does not support Write Strobe. Accept and hide this message. Technical and de facto standards for wired computer buses. Sorry, your browser is not supported. This page was last edited on 28 Novemberat If you are not happy with the use of these cookies, please review our Cookie Policy to learn how they can be disabled.

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

APB Advanced Peripheral Bus interface is optimized for minimal power consumption and reduced interface complexity. Error responses are returned to the master. AMBA is a solution for the blocks to interface with each other.


AMBA APB Protocol Specification v | AMBA APB Protocol Specification v – Arm Developer

A simple transaction on the AHB consists of an address phase and a subsequent data phase without wait states: Views Read Edit View history. This subset simplifies the design for a bus with a single master. By disabling cookies, some features of the site will not work. Retrieved from ” https: Over the next few months we will be adding more developer resources and documentation for all the products and technologies that ARM provides.

Signal transitions are sampled at the rising edge of the clock to enable the integration of APB peripherals easily into any design flow. This site uses cookies to store information on your computer. JavaScript seems to be disabled in your browser. You copied the Doc URL to your clipboard. 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 bus has an address and data phase similar to AHB, but a much reduced, low complexity signal list for example no bursts. Access to the target device is controlled through a MUX non-tristatethereby admitting bus-access to one bus-master at a time.

The AMBA specification defines an on-chip communications standard for designing high-performance embedded microcontrollers.

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