Dynamic brownout adjustment in a storage device

• US 9,129,665 B2
• Filed: 12/19/2013
• Issued: 09/08/2015
• Est. Priority Date: 12/17/2013
• Status: Active Grant

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: SanDisk Enterprise IP LLC (Western Digital Corporation)
• Inventors: Lucas, Gregg S., Delpapa, Kenneth B., Ellis, Robert W.
• Primary Examiner(s): Lam, David
• Application Number:
  US14/135,429
• Publication Number:
  US 20150170716A1
• Time in Patent Office: 628 Days
• Field of Search: 365/226, 365/227, 365/189.05, 365/189.09
• US Class Current: 1/1
• CPC Class Codes: G11C 11/4074 Power supply or voltage generation circuits, e.g. bias voltage generators, substrate voltage generators, back-up power, power control circuits
• CPC Class Codes: G11C 16/30 Power supply circuits
• CPC Class Codes: G11C 29/021 in voltage or current generators
• CPC Class Codes: G11C 29/028 with adaption or trimming of parameters
• CPC Class Codes: G11C 5/145 Applications of charge pumps; Boosted voltage circuits; Clamp circuits therefor G11C5/141 takes precedence
• CPC Class Codes: G11C 5/147 Voltage reference generators, voltage or current regulators; Internally lowered supply levels; Compensation for voltage drops G11C5/141 takes precedence
• CPC Class Codes: G11C 5/148 Details of power up or power down circuits, standby circuits or recovery circuits

Abstract

The various embodiments described herein include systems, methods and/or devices used to enable dynamic brownout adjustment in a storage device. In one aspect, the method includes: (1) obtaining a set of power tolerance settings, the set of power tolerance settings used for determining whether one or more power supply voltages provided to the storage device are out of range, (2) in response to a predefined trigger, adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device, (3) determining, in accordance with the adjusted set of power tolerance settings, whether the one or more power supply voltages are out of range, and (4) in accordance with a determination that the one or more power supply voltages are out of range, latching a power fail condition.

Claims

1. A method of protecting data in a storage device, the method comprising:

obtaining a set of power tolerance settings, the set of power tolerance settings used for determining whether one or more power supply voltages provided to the storage device are out of range;

in response to a predefined trigger, adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device;

determining, in accordance with the adjusted set of power tolerance settings, whether the one or more power supply voltages are out of range; and

,

in accordance with a determination that the one or more power supply voltages are out of range, latching a power fail condition.

2. The method of claim 1, wherein the one or more power supply voltages provided to the storage device include a voltage supplied for serial presence detect (SPD) functionality.

3. The method of claim 1, wherein the one or more power supply voltages provided to the storage device include a first power supply voltage and a second power supply voltage, wherein the second power supply voltage is a voltage supplied for serial presence detect (SPD) functionality and the first power supply voltage is lower than the second power supply voltage.

4. The method of claim 1, wherein adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device includes adjusting the set of power tolerance settings in accordance with a workload metric.

5. The method of claim 1, wherein adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device includes adjusting the set of power tolerance settings in accordance with one or more operating conditions.

6. The method of claim 1, wherein adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device includes adjusting the set of power tolerance settings in accordance with a user-selectable guide.

7. The method of claim 1, wherein adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device includes adjusting the set of power tolerance settings in accordance with one or more internally generated signals, internally generated within the storage device.

8. The method of claim 1, wherein adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device includes adjusting the set of power tolerance settings in accordance with one or more commands from a host system.

9. The method of claim 1, wherein adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device includes adjusting the set of power tolerance settings in accordance with one or more internally generated signals, internally generated within the storage device and one or more commands from a host system, wherein the one or more commands from the host system have higher priority than the one or more internally generated signals.

10. The method of claim 1, wherein the storage device includes a dual in-line memory module (DIMM) device.

11. A storage device, comprising:

an interface for operatively coupling the storage device with a host system;

the storage device configured to;

obtain a set of power tolerance settings, the set of power tolerance settings used for determining whether one or more power supply voltages provided to the storage device are out of range;

in response to a predefined trigger, adjust the set of power tolerance settings in accordance with one or more parameters of the storage device;

determine, in accordance with the adjusted set of power tolerance settings, whether the one or more power supply voltages are out of range; and

,

in accordance with a determination that the one or more power supply voltages are out of range, latch a power fail condition.

12. The storage device of claim 11, wherein the one or more power supply voltages provided to the storage device include a voltage supplied for serial presence detect (SPD) functionality.

13. The storage device of claim 11, wherein the one or more power supply voltages provided to the storage device include a first power supply voltage and a second power supply voltage, wherein the second power supply voltage is a voltage supplied for serial presence detect (SPD) functionality and the first power supply voltage is lower than the second power supply voltage.

14. The storage device of claim 11, wherein the storage device is configured to adjust the set of power tolerance settings in accordance with one or more parameters of the storage device by adjusting the set of power tolerance settings in accordance with a workload metric.

15. The storage device of claim 11, wherein the storage device is configured to adjust the set of power tolerance settings in accordance with one or more parameters of the storage device by adjusting the set of power tolerance settings in accordance with one or more operating conditions.

16. The storage device of claim 11, wherein the storage device is configured to adjust the set of power tolerance settings in accordance with one or more parameters of the storage device by adjusting the set of power tolerance settings in accordance with a user-selectable guide.

17. The storage device of claim 11, wherein the storage device is configured to adjust the set of power tolerance settings in accordance with one or more parameters of the storage device by adjusting the set of power tolerance settings in accordance with one or more internally generated signals, internally generated within the storage device.

18. The storage device of claim 11, wherein the storage device is configured to adjust the set of power tolerance settings in accordance with one or more parameters of the storage device by adjusting the set of power tolerance settings in accordance with one or more commands from a host system.

19. The storage device of claim 11, wherein the storage device is configured to adjust the set of power tolerance settings in accordance with one or more parameters of the storage device by adjusting the set of power tolerance settings in accordance with one or more internally generated signals, internally generated within the storage device and one or more commands from a host system, wherein the one or more commands from the host system have higher priority than the one or more internally generated signals.

20. A non-transitory computer readable storage medium, storing one or more programs for execution by one or more processors of a storage device, the one or more programs including instructions for:

obtaining a set of power tolerance settings, the set of power tolerance settings used for determining whether one or more power supply voltages provided to the storage device are out of range;

in response to a predefined trigger, adjusting the set of power tolerance settings in accordance with one or more parameters of the storage device;

determining, in accordance with the adjusted set of power tolerance settings, whether the one or more power supply voltages are out of range; and

,

in accordance with a determination that the one or more power supply voltages are out of range, latching a power fail condition.