Glossary
Glossary-2
Copyright © 2003, 2004. ARM Limited. All rights reserved.
ARM DDI 0306B
Advanced Microcontroller Bus Architecture (AMBA)
AMBA is the ARM open standard for multi-master on-chip buses, capable of running
with multiple masters and slaves. 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. AHB
conforms to this standard.
Advanced Peripheral Bus (APB)
The AMBA Advanced Peripheral Bus is a simpler bus protocol than AHB. It is designed
for use with ancillary or general-purpose peripherals such as timers, interrupt
controllers, UARTs, and I/O ports. Connection to the main system bus is through a
system-to-peripheral bus bridge that helps to reduce system power consumption.
See also
Advanced High-performance Bus.
AHB
See
Advanced High-performance Bus.
AMBA
See
Advanced Microcontroller Bus Architecture.
APB
See
Advanced Peripheral Bus.
ATPG
See
Automatic Test Pattern Generation.
Automatic Test Pattern Generation (ATPG)
The process of automatically generating manufacturing test vectors for an ASIC design,
using a specialized software tool.
AXI
See
Advanced eXtensible Interface.
Byte
An 8-bit data item.
Core
A core is that part of a processor that contains the ALU, the datapath, the
general-purpose registers, the Program Counter, and the instruction decode and control
circuitry.
DNM
See
Do Not Modify.
Do Not Modify (DNM)
In Do Not Modify fields, the value must not be altered by software. DNM fields read as
Unpredictable values, and must only be written with the same value read from the same
field on the same processor.
Halfword
A 16-bit data item.
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