µVision4 User's Guide
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µVision4 User's Guide

About µVision User Interface Creating Applications Utilities Debugging Using the Debugger Simulation Start Debugging Application Program Execution Debug Windows and Dialogs Breakpoints Window Call Stack and Locals Window Code Coverage Command Window Disassembly Window Event Viewer Execution Profiler Instruction Trace Window Logic Analyzer Setup Setup in Detail Restrictions Using the Logic Analyzer Memory Map Memory Window Performance Analyzer Registers Window Serial Window Symbols Window System Viewer Adding System Viewer Windows Toolbox Trace Data Window Trace Navigation Watch Window Expressions Constants System Variables Peripheral Variables I/O Ports Serial Ports Program Variables (Symbols) Fully Qualified Symbols Non-Qualified Symbols Literal Symbols Using Symbols Line Numbers Bit Addresses Type Specifications Operators Memory Type Specifiers Differences Between µVision4 and C Expression Examples Tips and Tricks Review Peripherals and CPU Configuration Simulate I/O Ports Simulate Interrupts and Clock Inputs Simulate external I/O Devices Assign Serial I/O to a PC COM Port Check Illegal Memory Access Command Input from File Preset I/O Ports or Memory Contents Write Debug Output to a File Keyboard Shortcuts TPIU Initialization after RESET (Cortex-M) Debug Commands Debug Functions Simulation Flash Programming Dialogs Example Programs Command Line Appendix

Memory Type Specifiers

Memory Type Specifiers identify the memory areas, code banks, and SFR banks of 80x51 microcontrollers in debug commands. µVision provides predefined memory type specifiers. In addition, developers can create and address memory areas through user-defined memory type specifiers. Memory type specifiers are separated by a colon (:) from the memory address.

The table below shows the memory type specifiers and their availability for 80x51 microcontrollers.

Specifier805125151MXDescription
D:availableavailableavailableDATA; Internal, direct-addressable data memory.
I:availableavailableavailableIDATA; Internal, indirect-addressable data memory.
X:availableavailableavailableXDATA; External data memory.
C:availableavailableavailableCODE; Code memory.
E: available Extended memory; Code and data memory.
Bn:availableavailable Code Banks; n is in the range [0..31].
Dn:available  SFR Banks; n is in the range [0..15].
S:
T:
U:
V:
availableavailable User-defined memory type specifiers. Memory areas of up to 64KB each can be defined. Use the debug command MAP to define the memory areas. The identifiers can be used to simulate external devices such as EEPROMs or LCDs. These memory areas cannot be addressed by the simulated CPU.

Memory type specifiers can be used in the following commands and debug functions: ASM, BreakAccess, BreakSet, Display, Enter, EVALuate, Go, MAP, PerofrmanceAnalyzer, SAVE, Unassemble, _RBYTE, _RDOUBLE, _RDWORD, _RFLOAT, _RWORD, _WBYTE, _WDOUBLE, _WDWORD, _WFLOAT, and _WWORD.

Note

  • Examples can be found in the corresponding debug commands or debug functions.
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