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My am335x device speed Range

jacky xiao
Intellectual 435 points

Other Parts Discussed in Thread: AM3359

This is the am3359 sample we put on our custom board,

when configure to 720Mhz,  I easily get the error "No more output is seen on the console after "booting the kernel".  but always get "Kernel panic - not syncing: VFS: Unable to mount root fs ".

when configure to 550Mhz,  I can boot  sucesslly Linux kernel. but I  always get "Kernel Panic " when  running my application in Linux.

when  conifgure to 275Mhz,  the board  is stable.

DDR3  run on 303Mhz.

Any idea for it ?   Hw  or Sw  issue ?  I need your help , thanks!

 

 

 

  • 0
    TI__Guru**** 393215 points
    Hi Jackie,
     
    Comments on the picture you sent. According to Errata section 1.2 Revision Identification:
    • Note (A) Non-qualified devices are marked with the letters "X" or "P" at the beginning of the device name, while qualified devices have a "blank" at the beginning of the device name.
    • Note (J) On some "X" devices, the device speed may not be shown.

    It may well be a hardware issue, the processor may be 275MHz speed grade.

    Best Regards
    Biser