Bootloader and Read-while-write (RWW)

[h p]

Hello,

we are using a STM32F429.

The bootloader is located in the first 64kB. The firmware in the remaining sectors.

It erases the remaining sectors of the flash and writes the new firmware.

Now, 3.6.5 Read-while-write (RWW) of the reference manual states that "This feature allows to perform a read operation from one bank while an erase or program operation is performed to the other bank."

Does this mean that reads from the same bank as a sector is erased is not allowed?

If so, how should the bootloader update the firmware in Bank 0, where the bootloader sits itself?

Many thanks in advance for your answer!

 

[TDK]

If you read and write from within the same bank, the read operation will block until the erase/write operation is complete. There are no issues doing this.

If in separate banks, they can operate in parallel.

[h p]

I understand. Thank you very much!