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STM32F429ZIT6 Reset values for Flash Option Bytes when power cycle

ifik ifik
Associate
Posted on June 01, 2018 at 07:55

Hi all,

The following problem is appearing

changing

sectors write protection and

power disappearing in the middle of a HAL_FLASH_OB_Launch operation. After the next power up, flash options are reset with RDP = 1 and all sectors are read / write protected with SPRMOD enabled (PCROP protected sectors).  

So the mcu is totally inoperative, the cpu is not able to load the interrupt vector through flash D-Bus

.

The starting situation is:

0690X00000604dBQAQ.jpg

 

If power cycle the board repeatedly, chaining sector write protection operations, these are the flash options after some resets:

0690X00000604dGQAQ.jpg

Anyone can confirm that this behavior is correct?

Is there any way to mitigate this problem?

Thanks,

#flash-corrupt #stm32-f4 #flash-api
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