purpose of DDR_DRAMRST# and MEMRST#?

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  • stinkingshoe
    New Member
    • Aug 2024
    • 4
    • Canada
    #1

    purpose of DDR_DRAMRST# and MEMRST#?

    I'm new to BoardReader and schematics.
    I did, however find a schematic for my board here:
    Code:
    https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/91332-la-j801p-schematic-acer-a315-56
    If I trigger a system restart by shorting CC20 to ground, system memory is wiped clean (Memory dump is mostly: AF AF AF AF AF AF hex values).
    However, if I click restart the machine via software, artifacts persist in memory and there is no AF AF AF at all.

    This leads me to believe the board is clearing memory on start.

    I see within BoardReader DDR_DRAMRST# and MEMRST# on RD202. My question is this: If RD202 were removed, would the system be unable to clear RAM on a restart triggered from CC20?
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