Microchip Technology MPLAB ICE, User Manual

Page: 175 / 192

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2001 Microchip Technology Inc. DS51159B-page 175
Glossary
Local Label
A local label is one that is defined inside a macro with the
LOCAL
directive.
These labels are particular to a given instance of a macro’s instantiation. In
other words, the symbols and labels that are declared as local are no longer
accessible after the
ENDM
macro is encountered.
Logic Probes
Up to 14 logic probes connected to the emulator. The logic probes provide
external trace inputs, trigger output signal, +5V and a common ground.
Machine Code
Either object or executable code.
Macro
A collection of assembler instructions that are included in the assembly code
when the macro name is encountered in the source code. Macros must be
defined before they are used; forward references to macros are not allowed.
All statements following a
MACRO
directive and prior to an
ENDM
directive are
part of the macro definition. Labels used within the macro must be local to the
macro so the macro can be called repetitively.
Macro Directives
Directives that control the execution and data allocation within macro body
definitions.
Make Project
A command that rebuilds an application, re-compiling only those source files
that have changed since the last complete compilation.
MCU
Microcontroller Unit. An abbreviation for microcontroller. Also
µ
C.
Memory Models
Versions of libraries and/or precompiled object files based on a device’s
memory (RAM/ROM) size and structure.
Microcontroller
A highly integrated chip that contains all the components comprising a
controller. Typically this includes a CPU, RAM, some form of ROM, I/O ports
and timers. Unlike a general-purpose computer, which also includes all of
these components, a microcontroller is designed for a very specific task – to
control a particular system. As a result, the parts can be simplified and
reduced, which cuts down on production costs.
Microcontroller Mode (PIC17CXXX and PIC18CXXX Devices Only)
One of the possible program memory configurations of the PIC17CXXX and
PIC18CXXX families of microcontrollers. In microcontroller mode, only
internal execution is allowed. Thus, only the on-chip program memory is
available in microcontroller mode.