µVISION: Setting XDATA Memory Limit for C51 Programs

Information in this article applies to:

• µVision Version 2.12 and later

QUESTION

How do I set a limit so that my program does not access off-chip xdata memory beyond 32k?

ANSWER

In µVision...

1. Open the Options for Target dialog.
2. Select the Target Tab.
3. Set the start address of the off-chip xdata memory to 0x0000 and the size to 0x8000.

When you compile and link your program, the link check to see if you have exceeded the XDATA size. If so, an error message is output indicating a memory space overflow.

Last Reviewed: Thursday, October 29, 2020