Skip to main content
M
mark9
Visitor II
December 11, 2007
Question

LVD Reset does not work on STR912FA W44X6 rev G

  • December 11, 2007
  • 2 replies
  • 670 views
Posted on December 11, 2007 at 20:08

LVD Reset does not work on STR912FA W44X6 rev G

    This topic has been closed for replies.

    2 replies

    M
    mark9Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:48

    We are using rev G silicon (date code 728). I have experimented with the LVD and it does not seem to work. When VDDQ falls to 3V, the external supervisor pulls RESET_IN# low, and it stays low for 120 milliseconds. When it comes high again, the STR9 will not boot. I need to do a full cold power cycle to regarding control, even if I manually pull RESET_IN# low several times.

    The errata mentions that this exists in rev E silicon but that it was fixed in rev G silicon. Is this true?

    M
    mark9Author
    Visitor II
    May 17, 2011
    Posted on May 17, 2011 at 09:48

    I think understand the problem. The problem is not Errata 2.10 (LVD Logic may hold reset active inappropriately) but Errata 2.14 (Flash Memory remapping).

    If you use a bootloader and depend on RESET_IN using an external supervisor chip, you are out of luck, because once if you run BANK0 as the non-boot bank, then RESET is broken.

    Unfortunately, Errata 2.14 is not fixed.

    Terms & ConditionsAccessibility statement