DRA78XEVM: Flash and RAM read bits

Hatem

Expert 1685 points

Part Number: DRA78XEVM

Does the DRA78x has read/copy bits for the Flash and/or RAM ?

over 6 years ago

0 Stanislav Stilyanov over 6 years ago

TI__Mastermind 18950 points

Hi Hatem,

Can you please develop your question a little more? What these bits should do?

Regards,

Stan

0 Hatem over 6 years ago in reply to Stanislav Stilyanov

Expert 1685 points

Hi Stan,

To protect an algo from being copied from the flash or from the RAM

These bits are normally associated with secure sectors in Flash .

Regards

Hatem

0 Stanislav Stilyanov over 6 years ago in reply to Hatem

TI__Mastermind 18950 points

If I understand well, you mean the flash read protection like in the microcontrollers with embedded RAM/flash.

In DRAxx SoCs, flash and RAM are external chips, so you cannot just write a bit or a fuse and protect from external reading. It could be possible there is flash chips on the market with some read protection but this is out of DRAxx scope, so I can't tell.

It is OS's (Linux) task, when system is up, to protect your files and memory with some hardware assistance (like firewalls, security accelerators, secure ROM boot).

There is also various crypto softwares that can help protect your data. I'm not, however, an expert in this area so it will be hard for me to help any further.

Regards,

Stan

0 Hatem over 6 years ago in reply to Stanislav Stilyanov

Expert 1685 points

The protection is not from interfering with the code.

But to stop any user of the board from copying an algo code within the firmware, and then reverse engineer the algo code.

Do you have more info on Secure ROM boot

Regards

Hatem

0 Stanislav Stilyanov over 6 years ago in reply to Hatem

TI__Mastermind 18950 points

Secure boot spec is not freely available. It can be obtained by your local TI representative under NDA.

Regards,

Stan

0 Hatem over 6 years ago in reply to Stanislav Stilyanov

Expert 1685 points

Hello Stan,

I need the name and email address of the person in TI whom we need to approach regarding this issue.

Regards

0 kcastille over 6 years ago in reply to Hatem

TI__Guru 54512 points

Hatem,

I will contact you via PM.

Thanks,

Kyle

0 Hatem over 6 years ago in reply to kcastille

Expert 1685 points

Hi Kyle

I have sent you PM

Regards

Hatem

0 Yordan Kamenov over 5 years ago in reply to Hatem

TI__Mastermind 42515 points

Hi Hatem,

Do you communicate with Kyle? Can we close the thread?

Regards,

Yordan

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DRA78XEVM: Flash and RAM read bits