option bytes to be set during manufacturing when launching the product to market.

[Kpodu.1]

Hi All,

We are launching one of our product to market. And we are using STM32F429ZiT6 MCU.

Recently I am going through the data sheet for list of option bytes which needs to be set during manufacturing. I have an understanding on what should be set. But I just want to confirm my understanding and these will serve the purpose.

Below is our application roughly.

In the first 3 sectors we have the bootloader-------- which never changes

We do an OTA for the application. So the rest of sectors are divided in to 2---1 for main application....1 for back up.

The rest of sectors(4-24) are divided into 2 -----10 sectors each for --- application and back up

so we do write and erase operations from sector 4-24.

So given the above situation.

The option bytes we are setting is

RDP- > Level 2(0xCC) because no one must be able to read through JTAG, SWV,...etc

Write protection on sector 0, sector 1 , sector 2 ------because bootloader is unchanged.

Rest of the sectors are not write protected as we are erasing and writing them.

Above are the option bytes. Any suggestion?

Thanks,

krishna

[Bouraoui Chemli]

Hi @Kpodu.1​ 

Your understanding is correct. However you can refer to RM0090 Rev18 for more details about option bytes.

Bouraoui