Systems and methods of exiting hibernation in response to a triggering event

• US 9,069,551 B2
• Filed: 12/22/2011
• Issued: 06/30/2015
• Est. Priority Date: 12/22/2011
• Status: Active Grant

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: Sandisk Technologies Incorporated (Western Digital Corporation)
• Inventors: Iarovici, Yaniv, Yerushalmi, Daniel Zvi, Pomerantz, Itzhak, Yairi, Rahav
• Primary Examiner(s): TRAN, VINCENT HUY
• Application Number:
  US13/335,332
• Publication Number:
  US 20130166932A1
• Time in Patent Office: 1,286 Days
• Field of Search: 713/300, 713/310, 713/320, 713/323
• US Class Current: 1/1
• CPC Class Codes: G06F 1/3206 Monitoring of events, devices or parameters that trigger a change in power modality
• CPC Class Codes: G06F 1/3231 Monitoring the presence, absence or movement of users
• CPC Class Codes: G06F 1/3275 Power saving in memory, e.g. RAM, cache
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A method may be performed by an electronic device coupled to a volatile system memory. The method includes entering a hibernation mode of the electronic device, where in the hibernation mode, the volatile system memory is powered off. The method further includes detecting a triggering event and, in response to detecting the triggering event, exiting the hibernation mode. While exiting the hibernation mode, the volatile system memory is powered and a pre-hibernation state of the volatile system memory is restored.

Claims

1. A method comprising:

in an electronic device with an application processor coupled to a data storage device, the data storage device including a controller, a volatile memory, a non-volatile memory, and a hibernate data bus, wherein the hibernate data bus is configured to enable a data transfer from the volatile memory to the non-volatile memory, and wherein the data transfer bypasses the controller, performing;

entering a hibernation mode of the electronic device, wherein entering the hibernation mode includes causing the data storage device to perform a data save operation by copying data from the volatile memory to the non-volatile memory via the hibernate data bus and powering off the volatile memory;

detecting a triggering event; and

exiting the hibernation mode responsive to detecting the triggering event, wherein exiting the hibernation mode includes causing the data storage device to power on the volatile memory and restore the data to the volatile memory.

2. The method of claim 1, wherein the triggering event is based on a temperature difference between a temperature sensed by a thermometer of the electronic device and a reference temperature.

3. The method of claim 1, wherein the triggering event is based on a detection of motion of the electronic device based on a difference between an audio sound acquired by a microphone of the electronic device and a reference audio sound.

4. The method of claim 1, wherein the triggering event is based on a detection of motion of the electronic device based on a difference between an image acquired by a camera of the electronic device and a reference image.

5. The method of claim 1, wherein the triggering event is based on a change in capacitance of the electronic device.

6. The method of claim 1, wherein the triggering event is based on a detection of motion of the electronic device sensed by an accelerometer.

7. The method of claim 1, wherein the triggering event is based on historical use data of the electronic device.

8. The method of claim 1, wherein the data storage device includes a packaged memory device that includes the volatile memory, the non-volatile memory, and the controller.

9. The method of claim 1, wherein the data storage device is removable from the electronic device.

10. The method of claim 1, wherein the data storage device is embedded in the electronic device.

11. An electronic device comprising:

a data storage device including a controller, a volatile memory, a non-volatile memory, and a hibernate data bus, wherein the hibernate data bus is configured to transfer data from the volatile memory to the non-volatile memory and wherein the transfer of the data bypasses the controller;

a processor coupled to the data storage device, the processor configured to initiate entering a hibernation mode, wherein entering the hibernation mode includes causing the data storage device to perform a data save operation by copying data from the volatile memory to the non-volatile memory via the hibernate data bus and powering off the volatile memory;

wherein the processor is configured to detect a triggering event and responsive to the processor detecting the triggering event, to initiate exiting of the hibernation mode; and

wherein existing the hibernation mode causes the data storage device to power on the volatile memory and copy data stored at the non-volatile memory to the volatile memory.

12. The electronic device of claim 11, wherein the triggering event is based on a temperature difference between a temperature sensed by a thermometer of the electronic device and a reference temperature.

13. The electronic device of claim 11, wherein the triggering event is based on a detection of motion of the electronic device based on a difference between an audio sound acquired by a microphone of the electronic device and a reference audio sound.

14. The electronic device of claim 11, wherein the triggering event is based on a detection of motion of the electronic device based on a difference between an image acquired by a camera of the electronic device and a reference image.

15. The electronic device of claim 11, wherein the triggering event is based on a change in capacitance of the electronic device.

16. The electronic device of claim 11, wherein the triggering event is based on a detection of motion of the electronic device sensed by an accelerometer.

17. The electronic device of claim 11, wherein the triggering event is based on a time difference between an alarm time set by a user and a system clock time.

18. The electronic device of claim 11, wherein the triggering event is based on historical use data of the electronic device.

19. The electronic device of claim 11, wherein the data storage device includes a packaged memory device that includes the memory, the non-volatile memory, and the controller.

20. The electronic device of claim 11, wherein the data storage device is removable from the electronic device.

21. The electronic device of claim 11, wherein the data storage device is embedded in the electronic device.