Semiconductor memory device with per-channel alert of row hammer attack

Abstract

Disclosed are methods, systems, and apparatuses for providing per-channel row hammer alerts, from a memory device to a host, without the use of a dedicated per-channel alert interface. When detecting a row hammer alert condition, the memory device may determine whether an existing interface (e.g., a severity interface used to transmit severity information) is available. The interface may be available outside of certain designated burst positions during a read burst. Once the interface is available, the memory device may transmit a row hammer alert indication to the host. The host may determine whether information received over the interface is associated with a row hammer alert or severity, depending on when the information was received (e.g., in what burst position during a read burst).