User manual

MPLAB

REAL ICE

™

In-Circuit Emulator User’s Guide

Qualifier

An address or an address range used by the pass counter or as an event before

another operation in a complex trigger.

Radix

The number base, HEX, or decimal, used in specifying an address.

RAM

Random Access Memory (data memory). Memory in which information can be

accessed in any order.

Raw Data

The binary representation of code or data associated with a section.

Real Time

When released from the halt state in the Emulator or MPLAB ICD mode, the processor

runs in Real-Time mode and behaves exactly as the normal chip would behave. In

Real-Time mode, the real-time trace buffer of MPLAB ICE is enabled and constantly

captures all selected cycles, and all break logic is enabled. In the emulator or MPLAB

ICD, the processor executes in real time until a valid breakpoint causes a halt, or until

the user halts the emulator. In the simulator, real time simply means execution of the

microcontroller instructions as fast as they can be simulated by the host CPU.

Recursion

The concept that a function or macro, having been defined, can call itself. Great care

should be taken when writing recursive macros; it is easy to get caught in an infinite

loop where there will be no exit from the recursion.

ROM

Read Only Memory (program memory). Memory that cannot be modified.

Run

The command that releases the emulator from halt, allowing it to run the application

code and change or respond to I/O in real time.

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 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 IDE will execute all assembly

level instructions generated by the line of the high-level C statement.