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There are two types of breakpoints: hardware breakpoints that use the break circuit built into the real LSI, and software breakpoints that are realized by replacing the program memory (code) built into the real LSI with break-specific instructions. Since software breakpoints rewrite/write back the internal flash memory of the real LSI, the response of emulation execution and step execution may be delayed.
Breakpoint settings are software breakpoints (Regular) by default, but you can change them to hardware breakpoints. However, please note that it is not possible to switch over the maximum number of hardware breakpoints, which is 4 points.
For details on how to change to a hardware breakpoint, please refer to "7.13.2 Adding and Deleting Conditional Breakpoints" in the LEXIDE User's Manual.