Capacitor save energy verification

摘要

A memory subsystem includes a volatile memory, a nonvolatile memory, and a controller including logic to interface the volatile memory to an external system. The volatile memory is addressable for reading and writing by the external system. The memory subsystem includes a power controller with logic to detect when power from the external system to at least one of the volatile and nonvolatile memories and to the controller fails. When external system power fails, backup power is provided to at least one of the volatile and nonvolatile memories and to the controller for long enough to enable the controller to back up data from the volatile memory to the nonvolatile memory.

主权项

1. A memory device for use in a data processing system, the memory device comprising volatile memory and nonvolatile memory, the memory device further comprising:
circuits embodying logic to interrupt a power down save operation of the memory device upon detection of a restoration of system power, and to enable use of the memory device by the data processing system only if sufficient nonvolatile memory capacity of the memory device is available to backup an amount of the volatile memory capacity of the memory device; and circuits embodying logic to erase sufficient dirty nonvolatile memory to backup the amount of volatile memory capacity before enabling use of the memory device by the data processing system, and in the event that external system power fails before enabling use of the memory device but after some dirty nonvolatile memory has been erased, to backup at least portions of the volatile memory having data corresponding to data from the erased dirty nonvolatile memory.