STM32F427VGT6. Should be 1MB flash, right?Then what's up with this?Mass erase: works, erases sectors 0-11Write: works, can write to full 1MBSingle sector erase: doesn't work, either stlink or from firmware running on the device (see attached screenshot of STM32CubeProgrammer).What's going on with this MCU? Other identical MCUs on identical boards work just fine.

Associate II

Question

Why does my STM32F427VG not allow erasing the top half of flash?

STM32F427VGT6. Should be 1MB flash, right?

Then what's up with this?

Mass erase: works, erases sectors 0-11
Write: works, can write to full 1MB
Single sector erase: doesn't work, either stlink or from firmware running on the device (see attached screenshot of STM32CubeProgrammer).

What's going on with this MCU? Other identical MCUs on identical boards work just fine.

This topic has been closed for replies.

Guru

The FLASH size tested is burned into OTP at the factory at test time.

Mouser's decoder wheel says 1MB

STM32F427VGT6TR

I think the VI part has 2MB

STM32F427VIT6TR

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Associate II

Yes, I'm aware it should have 1MB of flash. I'm failing to erase the upper 512K of that 1MB.