Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Protecting EPCS

i posted this in the software forum, but perhaps it's really a hardware issue:

For my project, the EPCS contains all firmware, boot loader & application.

The firmware and bootloader will not change, but the application may, so I would like to protect the EPCS areas that contains the firmware & boot loader.

The firmware MUST be in the lower area of EPCS otherwise it can't be booted from (I believe).

According to cyc_c51014.pdf, only the upper areas of EPCS can be protected, not the lower areas.

So I can protect my application but not the firmware&bootloader (or protect everything).

Is this correct?

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    --- Quote Start ---

    i posted this in the software forum, but perhaps it's really a hardware issue:

    According to cyc_c51014.pdf, only the upper areas of EPCS can be protected, not the lower areas.

    So I can protect my application but not the firmware&bootloader (or protect everything).

    Is this correct?

    --- Quote End ---

    "the upper areas of EPCS can be protected, not the lower areas."

    This is the weired thing when i saw this part of the document. Why Altera try to protect the application part, not the default part? Or just our understanding problem?