TMS320F28377D-EP: FLASH sectors Access Protection

Hi Laurent,

The access protection mechanisms for Flash are different than RAM. What kind of access are you specifically trying to protect against?

Please review the TRM sections below for the features available on the device.

• Dual Code Security Module (DCSM)
  • Execute-Only Protection

Best,

Kevin

Kevin,

The idea is to run a custom bootloader from two or three FLASH sectors and to jump to an application software.

Before jumping to it, the bootloader will lock its FLASH sectors from write and fetch so that the application software cannot execute code from that region in case things go wrong.

Best,

Laurent

Hi Laurent,

OK, understand. I'm pulling in another expert to provide comment.

Best,

Kevin

Hi Laurent,

Thanks for your question. I'll get back to you within the next day.

Charles

Hi Laurent,

For Flash sectors we don't provide any lock that will prevent it from write/read. However we have DCSM feature which restricts the CPU access to the on-chip secure memory and resources without interrupting or stalling CPU execution. Refer DCSM section in TRM for more details.

However, their is an option of leaving some sectors programmed and only erasing specific sectors(Erase or program operation sector wise).

Regards,

Rajeshwary