Storage device and operating method of storage device

Patent metadata

Field	Value
Publication number	US-2016306592-A1
Application number	US-201615017984-A
Country	US
Kind code	A1
Filing date	Feb 8, 2016
Priority date	Apr 14, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

A storage device is provided which includes a nonvolatile memory and a temperature sensor. The temperature sensor is configured to detect a temperature of the storage device. The temperature sensor is configured to output temperature information. The storage device includes a memory controller. The memory controller is configured to access the nonvolatile memory in response to a request of an external host device. The memory controller is configured to obtain the temperature information from the temperature sensor according to a first period in a first mode. The temperature sensor is configured to obtain the temperature information from the temperature sensor according to a second period in a second mode. The second period is shorter than the first period.

First claim

What is claimed is:

1 . A storage device comprising:
a nonvolatile memory; a temperature sensor configured to detect a temperature of the storage device to output temperature information; and a memory controller configured to access the nonvolatile memory in response to a request from an external host device, wherein the memory controller is configured to obtain the temperature information from the temperature sensor according to a first period in a first mode, and to obtain the temperature information from the temperature sensor with a second period in a second mode, and wherein the second period is shorter than the first period.

2 . The storage device of claim 1 , wherein the memory controller is configured to operate at a first operating speed in the first mode and to operate at a second operating speed, lower than the first operating speed, in the second mode.

3 . The storage device of claim 1 , wherein the memory controller is configured to operate in the first mode when the temperature information indicates a temperature lower than a first temperature,
wherein the memory controller is configured to operate in the second mode when the temperature information indicates a temperature higher than or equal to the first temperature and lower than a second temperature higher than the first temperature, and wherein the memory controller is configured to operate in a third mode when the temperature information indicates a temperature higher than or equal to the second temperature.

4 . The storage device of claim 1 , wherein in the first mode, the first period is a fixed time period,
wherein in the second mode, the second period is a variable time period, and wherein in a third mode, the memory controller is configured to obtain the temperature information from the temperature sensor according to a third period, wherein the third period is a fixed time period.

5 . The storage device of claim 1 , wherein in the first mode, the memory controller is configured to operate at a first operating speed, and wherein the first operating speed is a fixed operating speed,
wherein in the second mode, the memory controller is configured to operate at a second operating speed, wherein the second operating speed is variable and the second operating speed is lower than the first operating speed, wherein in a third mode, the memory controller is configured to operate at a third operating speed, and wherein the third operating speed is fixed and the third operating speed is lower than the second operating speed.

6 . The storage device of claim 1 , wherein in the second mode, the memory controller is configured to adjust the second period based on the temperature information.

7 . The storage device of claim 1 , wherein in the second mode, the memory controller is configured to decrease the second period as a temperature corresponding to the temperature information increases and to increase the second period as the temperature corresponding to the temperature information decreases.

8 . The storage device of claim 1 , wherein in the second mode, the memory controller is configured to adjust an operating speed of the memory controller based on the temperature information.

9 . The storage device of claim 1 , wherein in the second mode, the memory controller is configured to decrease an operating speed of the memory controller as a temperature corresponding to the temperature information increases and to increase the operating speed of the memory controller as the temperature corresponding to the temperature information decreases.

10 . The storage device of claim 1 , wherein in the second mode, the memory controller is configured to calculate a difference between a previously detected temperature and a currently detected temperature and to adjust at least one of the second period or an operating speed of the memory controller based on the calculated difference.

11 . The storage device of claim 1 , wherein in the second mode, the memory controller is configured to increase or decrease at least one of the second period or an operating speed of the memory controller in a binary search algorithm, based on whether a temperature corresponding to the temperature information increases or decreases.

12 . The storage device of claim 1 , wherein in the second mode, the memory controller is configured to adjust an operating speed of the memory controller based on the temperature information to maintain a temperature corresponding to the temperature information.

13 . The storage device of claim 1 , wherein the nonvolatile memory comprises cell strings arranged on a substrate, and wherein each of the cell string includes at least one selection transistor and memory cells stacked in a direction perpendicular to the substrate.

14 . The storage device of claim 13 , wherein the at least one selection transistor and the memory cells are charge trap type transistors.

15 . An operating method of a storage device including a nonvolatile memory, a temperature sensor and a memory controller connected to the nonvolatile memory, the operating method comprising:
detecting a temperature using the temperature sensor according to a first period; detecting, when the detected temperature is higher than or equal to a first temperature, a second temperature using the temperature sensor according to a second period, wherein the second period is shorter than the first period; and adjusting an operating speed of the memory controller based on the second temperature.

16 . A storage device comprising:
a nonvolatile memory; a memory; a temperature sensor, wherein the temperature sensor is configured to detect a temperature of the storage device, and wherein the temperature sensor is configured to output temperature information and store temperature information in the memory; and a memory controller comprising a temperature manager, wherein the temperature manager is configured to obtain the temperature information from the temperature sensor according to a first period in a normal mode, wherein the temperature controller is configured to obtain the temperature information from the temperature sensor according to a second period in a fine control mode, and wherein the second period is shorter than the first period.

17 . The storage device of claim 16 , wherein the memory controller is configured to operate in the normal mode when the temperature information indicates a temperature lower than a first temperature,
wherein the memory controller is configured to operate in the fine control mode when the temperature information indicates a temperature higher than or equal to the first temperature and lower than a second temperature higher than the first temperature, and wherein the memory controller is configured to operate in a low heat mode when the temperature information indicates a temperature higher than or equal to the second temperature.

18 . The storage device of claim 16 , wherein in the normal mode, the first period is a fixed time period,
wherein in the fine control mode, the second period is a variable time period, and wherein in a low heat mode, the temperature manager is configured to obtain the temperature information from the temperature sensor according to a third period, wherein the third period is a fixed time period.

19 . The storage device of claim 16 , wherein in the normal mode, the first operating speed is a fixed operating speed,
wherein in the fine control mode, the memory controller is configured to operate at a second operati

Assignees

• Samsung Electronics Co Ltd

Inventors

• OH Yonggeun
• Kim Dae-Ho
• Lee Chul-Woo
• Han Gyucheol

Classifications

• G11C7/04 Primary

  with means for avoiding disturbances due to temperature effects · CPC title

• G06F3/0679

  Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP] · CPC title

• G06F3/0619

  in relation to data integrity, e.g. data losses, bit errors · CPC title

• G06F3/0653 Primary

  Monitoring storage devices or systems · CPC title

• G11C7/1045

  Read-write mode select circuits · CPC title