Microcontroller MB90F543G if there is read protection, what happens when you try to read the firmware? And how to bypass, if possible?

Question

Programming

Hello . Please tell me what happens when you try to read the firmware on the MB90F543G microcontroller with protection? In these matters, I am a complete kettle, I am engaged in repairs, and here it is necessary to change the controller. I'm afraid that the firmware will fly off, it will be a paragraph

Answer 1

Thank you . Is there a way to find out if it's blocked or not? The fact is that I ruined one firmware in the course of my actions, chose to open a file and opened it with the name MB90F543G, this file was already in the program with a bunch of others, probably these are files of supported controllers, the result is in all addresses FFFFFF. It's very confusing, I'm sorry.
Now if you drain it from the working apparatus (elevator)