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What is the fastest boot time on 6678?

Murat Tekalp
Intellectual 955 points

Hi, all:
  Our customer have one requirement that our 6678 board
needs to boot up as quick as possible.
  It is known that the 6678 has several boot modes, we can
exclude the SRIO, PCIe, Hyperlink boot modes. What is the
fastest boot mode in the remaining methods? How many seconds
can be achieved by the selected boot mode when the boot is completed
and the app starts to execute?
  Thanks!

  • 0
    TI__Guru* 81335 points

    You can use EMIF NOR, PCIe or hyperlink to boot as they are the fastest boot modes. We have measured the time from releasing reset to the start of activity on the the EMIF BUS(EMIF NOR) and found that the time duration between the 2 events is 4.8 milliseconds but have not performed any boot time measurements to confirm boot time on other boot modes.

    The EVM doesn`t have an EMIF16 NOR chip to boot from but essentially boot time from this boot media is zero if you boot from EMIF16 NOR Execute in place as there is no relocation of code. You can still test EMIF16 with 6678 EVM but via a expansion connectors:

    • The KeyStone EVMs contains expansion connectors.  This includes the EMIF16.  A separate board would be needed that mate with the expansion connector.  Some customers make custom bread boards for this purpose. Details about the EVM can be found here:

    http://www.advantech.com/Support/TI-EVM/6678le_sd.aspx

    For non-EMIF16 boot modes when you build your custom board you can shrink or eliminate the IBL on the board to further reduce boot time.

    Thank you.