User`s guide

MPLAB
®
IDE User’s Guide
DS51519B-page 264 © 2006 Microchip Technology Inc.
Linker Script Files
Linker script files are the command files of a linker. They define linker options and
describe available memory on the target platform.
Listing Directives
Listing directives are those directives that control the assembler listing file format. They
allow the specification of titles, pagination and other listing control.
Listing File
A listing file is an ASCII text file that shows the machine code generated for each C
source statement, assembly instruction, assembler directive or macro encountered in
a source file.
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 can be connected to some Microchip emulators. The logic probes
provide external trace inputs, trigger output signal, +5V and a common ground.
Machine Code
The representation of a computer program that is actually read and interpreted by the
processor. A program in binary machine code consists of a sequence of machine
instructions (possibly interspersed with data). The collection of all possible instructions
for a particular processor is known as its “instruction set”.
Machine Language
A set of instructions for a specific central processing unit, designed to be usable by a
processor without being translated.
Macro
Macroinstruction. An instruction that represents a sequence of instructions in
abbreviated form.
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 uC.
Message
Text displayed to alert you to potential problems in language tool operation. A message
will not stop operation.
Microcontroller
A highly integrated chip that contains a CPU, RAM, program memory, I/O ports and
timers.
Microcontroller Mode
One of the possible program memory configurations of PIC17 and PIC18 microcontrol-
lers. In microcontroller mode, only internal execution is allowed. Thus, only the on-chip
program memory is available in microcontroller mode.