User manual

MPLAB
®
PM3 User’s Guide
DS51464C-page 122 © 2006 Microchip Technology Inc.
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 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.
Microprocessor Mode
One of the possible program memory configurations of the PIC17CXXX and
PIC18CXXX families of microcontrollers. In microprocessor mode, the on-chip program
memory is not used. The entire program memory is mapped externally.
Mnemonics
Text instructions that can be translated directly into machine code. Also referred to as
Opcodes.