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µVision3 User's Guide

µVision3 Overview User Interface Creating Applications Utilities Debugging Debug Commands Debug Functions Simulation Flash Programming Dialogs File Device Database License Management Single-User License Floating-User License Floating License Administrator Edit Find in Files Configuration Editor Colors & Fonts User Keywords Shortcut Keys Templates View Symbol Window Project Components, Enviornment, and Books Project Components Folders/Extensions Books Multi-Project Select Device Options Device Properties Target Target (Keil ARM) Target (Keil C51) Target (Keil C166) Target (Keil C251) Target (GNU ARM) Target (RealView ARM) Output Output (Keil) Output (GNU ARM) Output (RealView ARM) Listing Listing (Keil) Listing (GNU ARM) Listing (RealView ARM) User Keil EC++ Compiler Compiler Keil CA ARM Compiler Keil Cx51 Compiler Keil C166 Compiler Keil C251 Compiler GNU ARM C Compiler RealView ARM C Compiler Assembler Keil AA ARM Assembler Keil Ax51 Assembler Keil A166 Assembler Keil A251 Assembler GNU ARM Assembler RealView ARM Assembler Linker Keil LA Locate Keil LA Misc Keil BL51 Locate Keil BL51 Misc Keil Lx51 Locate Keil Lx51 Misc Keil L166 Locate Keil L166 Misc GNU ARM Linker RealView ARM Linker Debug Utilities Batch Build Debug Breakpoints Debug Settings Logic Analyzer Memory Map Performance Analyzer Function Editor Tools Setup PC-Lint Customize Tools Menu SVCS Configure Version Control Example Programs Command Line Appendix

Memory Map

Current Mapped
[ToDo Text]Displays the current mapped memory ranges.
The addresses shown correspond to the way µVision maps logical segments to physical segments. For example, 0x00xxxx represents an address in DATA, IDATA, or EDATA space; 0x01xxxx represents an address in XDATA spase, and 0xFFxxxx represents an address in CODE space.
Kill Selected Range
Removes the selected mapped range from the list.
Map Range
The memory range may include a starting and ending address, in which case every byte in the range is mapped as specified in the Read, Write, Execute, and von Neumann check boxes. The box may include only a single byte address, in which case the byte is mapped as specified by the check boxes.
Memory range may be read.
The memory range may be written.
The memory range may be executed.
von Neumann
Identifies the specified memory range as von Neumann memory. When specified, µVision overlaps the external data memory (XDATA) range and code memory (0xFFxxxx). Write access to external data memory also change code memory.


  • von Neumann memory ranges may not lie in the code area nor may they cross a 64k boundary.
  • von Neumann memory is supported in the XDATA space of the C51 and C251 architectures only. It is not available for the C166.
  • von Neumann memory ranges must have both Read and Write access.
Map Range
Adds the specified memory range to the list.
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