Why my Flash Write is working?

[MAesc.1]

Hello

I can write and read to the flash, but in my opinion it should not work.

Facts:

• STM32F205RCT
• Flash Size: 256 kBytes

In the "FlashProgramming Manual" there is a maximum of 11 sectors mentioned. With total 1 MByte of memory. In my case I have only 256 kBytes, so I think I only have up to sector 5 available.

But when I try to write to sector 11 (0x080E 0000) it works:

Does anybody know why?

Thanks and best regards,

Manuel

[Tesla DeLorean]

>>Does anybody know why?

The die still has 1MB on it, they only tested the first 256KB, as they could run 3-4x the parts through the tester that way

[MAesc.1]

Ok, that is interesting. Thanks for the info.