Compute Through Power Loss Approach For Processing Device Having Nonvolatile Logic Memory

摘要

A computing device apparatus facilitates use of a deep low power mode that includes powering off the device's CPU by including a software routine configured to be run by the CPU that effects saving to a non-volatile memory a state of the CPU and/or the device's peripherals before entering the deep low-power mode. The software routine can be configured to control this state storage in response to detecting a low power event, i.e., loss of power sufficient to run the CPU, or a software command to enter the deep low power mode to save power as part of an efficiency program. Then, upon wake up from the deep low power mode, the software routine is first run by the CPU to effect restoring from the non-volatile memory the state of the CPU and the peripherals before execution of a primary application for the central processing unit.

主权项

1. A computing device apparatus comprising:
a central processing unit; a memory sub-system; a non-volatile memory; a power management unit or peripheral power sensing device configured to detect presence or absence of power for the central processing unit; wherein the power management unit is configured to effect switching off power applied to the central processing unit, peripherals for the computing device apparatus, and the memory sub-system to reach a deep low-power mode; a software routine configured to be run by the central processing unit to effect saving to the non-volatile memory a state of the central processing unit and the peripherals before entering the deep low-power mode and to effect restoring the state of the central processing unit and the peripherals from the non-volatile memory before execution of a primary application for the central processing unit; wherein the software routine is configured to be triggered to effect saving the state and entry into the deep low power mode in response to one or more of receiving indication of a power loss from the power management unit or the peripheral power sensing device, a software request to enter the deep low power mode, or a peripheral driven interrupt event.