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Can i interchange two chips in same serie?

Question asked by mao on Nov 16, 2016
Latest reply on Nov 18, 2016 by Clive One

I am using STM32F411RET6 and RCT6 chips. For some reasons, I can't tell the chip number in the board because it is blocked by something else.

Therefore I present all the chips are RCT6, which has a smaller code space.

In the program of keil, I assume the chip is RCT6. Everything is working well.

Now I have a new board with RET6, which has a larger code space.

My question is can I pretend the chip is RCT6 in keil and still access the flash space beyond 256k?

The RCT6 chip only has 256k flash space.