Interrupt Service Request (IRQ)
An event which causes the processor to temporarily suspend normal instruction execution and to start executing an
interrupt handler routine. Some processors have several interrupt request events allowing different priority interrupts.
Interrupt Service Routine (ISR)
Language tools:
A function that handles an interrupt.
MPLAB IDE/MPLAB X IDE:
User-generated code that is entered when an interrupt occurs. The location of the code
in program memory will usually depend on the type of interrupt that has occurred.
Interrupt Vector
Address of an interrupt service routine or interrupt handler.
L-value
An expression that refers to an object that can be examined and/or modified. An l-value expression is used on the
left-hand side of an assignment.
Latency
The time between an event and its response.
Library/Librarian
See
Archive/Archiver
.
Linker
A language tool that combines object files and libraries to create executable code, resolving references from one
module to another.
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.
Little Endian
A data ordering scheme for multi-byte data, whereby the least significant byte is stored at the lower addresses.
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.
Loop-Back Test Board
Used to test the functionality of the MPLAB REAL ICE in-circuit emulator.
Glossary
©
2020 Microchip Technology Inc.
User Guide
DS50002751D-page 72
