User`s guide
MPLAB
®
IDE User’s Guide
DS51519B-page 262 © 2006 Microchip Technology Inc.
External Symbol
A symbol for an identifier which has external linkage. This may be a reference or a
definition.
External Symbol Resolution
A process performed by the linker in which external symbol definitions from all input
modules are collected in an attempt to resolve all external symbol references. Any
external symbol references which do not have a corresponding definition cause a linker
error to be reported.
External Input Line
An external input signal logic probe line (TRIGIN) for setting an event based upon
external signals.
External RAM
Off-chip Read/Write memory.
File Registers
On-chip data memory, including General Purpose Registers (GPRs) and Special
Function Registers (SFRs).
Filter
Determine by selection what data is included/excluded in a trace display or data file.
Flash
A type of EEPROM where data is written or erased in blocks instead of bytes.
FNOP
Forced No Operation. A forced NOP cycle is the second cycle of a two-cycle instruction.
Since the PICmicro microcontroller architecture is pipelined, it prefetches the next
instruction in the physical address space while it is executing the current instruction.
However, if the current instruction changes the program counter, this prefetched
instruction is explicitly ignored, causing a forced NOP cycle.
GPR
General Purpose Register. The portion of device data memory (RAM) available for
general use.
Halt
A stop of program execution. Executing Halt is the same as stopping at a breakpoint.
Hex Code
Executable instructions stored in a hexadecimal format code. hex code is contained in
a hex file.
Hex File
An ASCII file containing hexadecimal addresses and values (hex code) suitable for
programming a device.
High Level Language
A language for writing programs that is further removed from the processor than
assembly.
ICD
In-Circuit Debugger. MPLAB ICD 2 is Microchip’s in-circuit debugger.
ICE
In-Circuit Emulator. MPLAB ICE 2000 and MPLAB ICE 4000 are Microchip’s in-circuit
emulators.