User guide

ID072410 Non-Confidential

Glossary

This glossary describes some of the terms used in technical documents from ARM.

Abort A mechanism that indicates to a core that the attempted memory access is invalid or not allowed or

that the data returned by the memory access is invalid. An abort can be caused by the external or

internal memory system as a result of attempting to access invalid or protected instruction or data

memory.

See also Data Abort, External Abort and Prefetch Abort.

Addressing modes Various mechanisms, shared by many different instructions, for generating values used by the

instructions.

Advanced High-performance Bus (AHB)

A bus protocol with a fixed pipeline between address/control and data phases. It only supports a

subset of the functionality provided by the AMBA AXI protocol. The full AMBA AHB protocol

specification includes a number of features that are not commonly required for master and slave IP

developments and ARM recommends only a subset of the protocol is usually used. This subset is

defined as the AMBA AHB-Lite protocol.

See also Advanced Microcontroller Bus Architecture and AHB-Lite.

Advanced Microcontroller Bus Architecture (AMBA)

A family of protocol specifications that describe a strategy for the interconnect. AMBA is the ARM

open standard for on-chip buses. It is an on-chip bus specification that details a strategy for the

interconnection and management of functional blocks that make up a System-on-Chip (SoC). It aids

in the development of embedded processors with one or more CPUs or signal processors and

multiple peripherals. AMBA complements a reusable design methodology by defining a common

backbone for SoC modules.