Datasheet

Glossary
 2013 Microchip Technology Inc. DS52085A-page 153
Serialized Quick Turn Programming
Serialization allows you to program a serial number into each microcontroller device
that the Device Programmer programs. This number can be used as an entry code,
password or ID number.
SFR
See Special Function Registers.
Shell
The MPASM assembler shell is a prompted input interface to the macro assembler.
There are two MPASM assembler shells: one for the DOS version, and one for the
Windows version.
Simulator
A software program that models the operation of devices.
Single Step
This command steps though code, one instruction at a time. After each instruction,
MPLAB X IDE updates register windows, watch variables, and status displays so you
can analyze and debug instruction execution. You can also single step C compiler
source code, but instead of executing single instructions, MPLAB X IDE will execute all
assembly level instructions generated by the line of the high level C statement.
Skew
The information associated with the execution of an instruction appears on the proces-
sor bus at different times. For example, the executed opcode appears on the bus as a
fetch during the execution of the previous instruction. The source data address and
value, and the destination data address appear when the opcode is actually executed,
and the destination data value appears when the next instruction is executed. The trace
buffer captures the information that is on the bus at one instance. Therefore, one trace
buffer entry will contain execution information for three instructions. The number of cap-
tured cycles from one piece of information to another for a single instruction execution
is referred to as the skew.
Skid
When a hardware breakpoint is used to halt the processor, one or more additional
instructions may be executed before the processor halts. The number of extra
instructions executed after the intended breakpoint is referred to as the skid.
Source Code
A text listing of commands that may be completed or assembled into object code.
Source code is written in a formal programming language that can be translated into
machine code or executed by an interpreter.
Source File
An ASCII text file containing source code.
Special Function Registers
The portion of data memory (RAM) dedicated to registers that control I/O processor
functions, I/O status, timers, or other modes or peripherals.
SQTP
See Serialized Quick Turn Programming.
Stack, Hardware
Locations in MCU or DSC where the return address is stored when a function call is
made.