DS51795A Datasheet, PDF (87/98 Pages) Microchip Technology – PICkit™ 3 Programmer/Debugger

Glossary
Octal
The base 8 number system that only uses the digits 0-7. The rightmost digit counts
ones, the next digit counts multiples of 8, then 8² = 64, etc.
Off-Chip Memory
Off-chip memory refers to the memory selection option for the PIC17 or PIC18 device
where memory may reside on the target board, or where all program memory may be
supplied by the debugger. The Memory tab accessed from Options>Development
Mode provides the Off-Chip Memory selection dialog box.
One-to-One Project-Workspace Model
The most common configuration for application development in MPLAB IDE to is have
one project in one workspace. Select Configure>Settings, Projects tab and check “Use
one-to-one project-workspace model”.
Opcodes
Operational Codes. See Mnemonics.
Operators
Symbols, like the plus sign ‘+’ and the minus sign ‘-’, that are used when forming
well-defined expressions. Each operator has an assigned precedence that is used to
determine order of evaluation.
OTP
One Time Programmable. EPROM devices that are not in windowed packages. Since
EPROM needs ultraviolet light to erase its memory, only windowed devices are eras-
able.
Pass Counter
A counter that decrements each time an event (such as the execution of an instruction
at a particular address) occurs. When the pass count value reaches zero, the event is
satisfied. You can assign the Pass Counter to break and trace logic, and to any
sequential event in the complex trigger dialog.
PC
Personal Computer or Program Counter.
PC Host
Any PC running a supported Windows operating system.
Persistent Data
Data that is never cleared or initialized. Its intended use is so that an application can
preserve data across a device reset.
Phantom Byte
An unimplemented byte in the dsPIC architecture that is used when treating the 24-bit
instruction word as if it were a 32-bit instruction word. Phantom bytes appear in dsPIC
hex files.
PIC MCUs
PIC microcontrollers (MCUs) refers to all Microchip microcontroller families.
PICSTART Plus
A developmental device programmer from Microchip. Programs 8-, 14-, 28-, and 40-pin
PIC microcontrollers. Must be used with MPLAB IDE software.
© 2009 Microchip Technology Inc.
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