Glossary
ARM DUI 0181B Copyright ©2002 ARM Limited. All rights reserved. Glossary-3
Hardware breakpoint
A breakpoint that is implemented using non-intrusive additional hardware. Hardware
breakpoints are the only method of halting execution when the location is in Read Only
Memory (ROM). Using a hardware breakpoint often results in the processor halting
completely. This is usually undesirable for a real-time system.
See also Breakpoint and Software breakpoint.
IEEE 1149.1 The IEEE Standard that defines TAP. Commonly (but incorrectly) referred to as JTAG.
See also Test Access Port
Integrator A range of ARM hardware development platforms. Core modules are available that
contain the processor and local memory.
Joint Test Action Group (JTAG)
An IEEE group focussed on silicon chip testing methods. Many debug and
programming tools use a Joint Test Action Group (JTAG) interface port to communicate
with processors. For further information refer to IEEE Standard, Test Access Port and
Boundary-Scan Architecture specification 1149.1 (JTAG).
JTAG See Joint Test Action Group.
JTAG interface unit A protocol converter that converts low-level commands from RealView Debugger into
JTAG signals to the EmbeddedICE logic and the ETM.
Little-endian Memory organization where the least significant byte of a word is at the lowest address
and the most significant byte is at the highest address of the word.
See also Big-endian.
Multi-ICE A JTAG-based tool for debugging embedded systems.
Pop-up menu Also known as Context menu. A menu that is displayed temporarily, offering options
relevant to your current situation. Obtainable in most RealView Debugger windows or
panes by right-clicking with the mouse pointer inside the window. In some windows the
pop-up menu can vary according to the line the mouse pointer is on and the tabbed page
that is currently selected.
Processor core The part of a microprocessor that reads instructions from memory and executes them,
including the instruction fetch unit, arithmetic and logic unit and the register bank. It
excludes optional coprocessors, caches, and the memory management unit.
Profiling A ccumulation of statistics during executio n of a program being debugged, to measure
performance or to determine critical areas of code.
RDI See Remote Debug Interface.