AnsweredAssumed Answered

SCU ROM boot time on IMX8QXP MEK board.

Question asked by tiebing guo on Apr 25, 2019
Latest reply on May 5, 2019 by igorpadykov

Dear Sirs


We are using android_p9.0.0_1.0.2-auto-beta release on IMX8QXP MEK board.

These days we are focusing on the M4 Core booting time(from POW ON to m4 demp app run).

As we tested it always need 170~250ms.

Then we enabled the scfw debug log, it shows the SCU ROM boot time need 150ms!


Hello from SCU (Build 3014, Commit f0226b37, Mar 2Hello from SCU (Build 3014, Commit f0226b37, Mar 27 2019 14:44:44)


SCFW: DDR frequency = 1200000000

ROM boot time  = 154894 usec   <<< Here, does it really mean the SCU PROM loading time ?

SCFW boot time  = 20852 usec

        Banner  = 6 usec

        Init    = 5447 usec

        Config  = 2969 usec

        DDR     = 5797 usec

        SConfig = 196 usec

        Prep    = 4310 usec

*** Debug Monitor ***


If it's true, is it possible to reduce the ROM boot time in obviously?

In our system design, we hope the M4 can hold the CAN bus msg in < 50ms after power on.