Protection of non-volatile memory component against data corruption due to physical shock

• US 20060010340A1
• Filed: 07/09/2004
• Published: 01/12/2006
• Est. Priority Date: 07/09/2004
• Status: Active Grant

• Current Assignee: Longhorn HD LLC (Alpha Alpha Intellectual Partners LLC)
• Original Assignee: Nokia Corporation
• Inventors: Ahvenainen, Marko, Makela, Jakke
• Granted Patent: US 7,318,170 B2
• Time in Patent Office: Days
• US Class Current: 714/5
• CPC Class Codes: G01P 15/0891 with indication of predetermined acceleration values G01P15/135 takes precedence
• CPC Class Codes: G01P 15/18 in two or more dimensions
• CPC Class Codes: G06F 11/1441 Resetting or repowering

Abstract

This invention provides a method to operate a terminal (100), as well as a terminal that operates in accordance with the method. The method includes, in response to initiating a data write operation with a non-volatile memory device (132), activating a sensor (190) that is capable of detecting that the terminal is falling; during the write operation, monitoring the sensor to determine if the terminal is falling and, if it is determined that the terminal is falling, terminating the write operation and executing a non-volatile memory shutdown procedure, else, if it is determined that the terminal is not falling, completing the write operation and deactivating the sensor.

Claims

1. A method to operate a terminal, comprising:

in response to initiating a data write operation with a non-volatile memory device, activating a sensor that is capable of detecting that the terminal is falling;

during the write operation, monitoring the sensor to determine if the terminal is falling; and

if it is determined that the terminal is falling, terminating the write operation and executing a non-volatile memory shutdown procedure,

else, if it is determined that the terminal is not falling, completing the write operation and deactivating the sensor.

2. A method as in claim 1, where monitoring includes operating the sensor at a sampling rate that is selected based on the type of non-volatile memory device that the write operation is directed to.

3. A method as in claim 1, where monitoring includes operating the sensor at a sampling rate that is selected based on an amount of time required to execute the non-volatile memory device shutdown procedure.

4. A method as in claim 1, where monitoring includes operating the sensor at a sampling rate that is selected based on a predetermined minimum threshold distance over which the terminal can fall.

5. A method as in claim 1, where monitoring includes operating the sensor at a sampling rate that is selected to minimize sensor power consumption within constraints imposed by at least one characteristic of the non-volatile memory device that the write operation is directed to.

6. A terminal that comprises at least one non-volatile memory device, a sensor capable of detecting that the terminal is falling, and a controller coupled to the non-volatile memory device, said controller operating in response to initiating a data write operation with the non-volatile memory device to activate the sensor, and during the write operation, to monitor the sensor to determine if the terminal is falling and, if it is determined that the terminal is falling, to terminate the write operation and to cause the non-volatile memory to execute a non-volatile memory shutdown procedure, else, if it is determined that the terminal is not falling, to allow the write operation to complete and to deactivate the sensor.

7. A terminal as in claim 6, where the sensor is operated at a sampling rate that is selected based on the type of non-volatile memory device that the write operation is directed to.

8. A terminal as in claim 6, where the sensor is operated at a sampling rate that is selected based on an amount of time required to execute the non-volatile memory device shutdown procedure.

9. A terminal as in claim 6, where the sensor is operated at a sampling rate that is selected based on a predetermined minimum threshold distance over which the terminal can fall.

10. A terminal as in claim 6, where the sensor is operated at a sampling rate that is selected to minimize sensor power consumption within constraints imposed by at least one characteristic of the non-volatile memory device that the write operation is directed to.

11. A terminal as in claim 6, where an output of the sensor is coupled to the controller for indicating that the sensor has detected that the terminal is falling, and where the controller is responsive to the sensor output to terminate the write operation and to cause the non-volatile memory device to execute the non-volatile memory shutdown procedure.

12. A terminal as in claim 6, where an output of the sensor is coupled to the non-volatile memory device for indicating that the sensor has detected that the terminal is falling, and where the non-volatile memory device is responsive to the sensor output to terminate the write operation and to execute the non-volatile memory shutdown procedure.

13. A terminal as in claim 6, where said terminal comprises a wireless communications device.

14. A wireless communications terminal that comprises at least one non-volatile memory device, an acceleration sensor and a controller coupled to the non-volatile memory device, said controller operating in response to initiating a data write operation with the non-volatile memory device to activate the sensor, and during the write operation, to monitor the sensor to determine if the terminal is accelerating at a rate that indicates that the terminal is falling, and, if it is determined that the terminal is falling, to terminate the write operation and to cause the non-volatile memory to execute a non-volatile memory shutdown procedure, else, if it is determined that the terminal is not accelerating at a rate that indicates that the terminal is falling, to allow the write operation to complete and to deactivate the sensor.

15. A wireless communications terminal as in claim 14, where the sensor is operated at a sampling rate that is selected based on the type of non-volatile memory device that the write operation is directed to.

16. A wireless communications terminal as in claim 14, where the sensor is operated at a sampling rate that is selected based on an amount of time required to execute the non-volatile memory device shutdown procedure.

17. A wireless communications terminal as in claim 14, where the sensor is operated at a sampling rate that is selected based on a predetermined minimum threshold distance over which the terminal can fall.

18. A wireless communications terminal as in claim 14, where the sensor is operated at a sampling rate that is selected to minimize sensor power consumption within constraints imposed by at least one characteristic of the non-volatile memory device that the write operation is directed to.

19. A wireless communications terminal as in claim 14, where an output of the sensor is coupled to the controller, and where the controller is responsive to the sensor output to terminate the write operation and to cause the non-volatile memory device to execute the non-volatile memory shutdown procedure.

20. A wireless communications terminal as in claim 14, where an output of the sensor is coupled to the non-volatile memory device, and where the non-volatile memory device is responsive to the sensor output to terminate the write operation and to execute the non-volatile memory shutdown procedure.

21. A wireless communications terminal as in claim 14, where said non-volatile memory device is comprised of at least one of a Flash memory device, a MultiMedia Card (MMC) and a Subscriber Identity Module (SIM).

22. A terminal that comprises at least one non-volatile memory device, a sensor capable of detecting that the terminal is falling, and a controller coupled to the non-volatile memory device, said controller operating in response to initiating an operation with the non-volatile memory device to activate the sensor, and during the operation, to monitor the sensor to determine if the terminal is falling and, if it is determined that the terminal is falling, to terminate the operation, else, if it is determined that the terminal is not falling, to allow the operation to complete and to deactivate the sensor.

23. A terminal as in claim 22, where the sensor is operated at a sampling rate that is selected based on the type of non-volatile memory device that the write operation is directed to.

24. A terminal as in claim 22, where the sensor is operated at a sampling rate that is selected based on an amount of time required to execute a non-volatile memory device shutdown procedure.

25. A terminal as in claim 22, where the sensor is operated at a sampling rate that is selected based on a predetermined minimum threshold distance over which the terminal can fall.

26. A terminal as in claim 22, where the sensor is operated at a sampling rate that is selected to minimize sensor power consumption within constraints imposed by at least one characteristic of the non-volatile memory device that write operation is directed to.

27. A terminal as in claim 22, where an output of the sensor is coupled to the controller for indicating that the sensor has detected that the terminal is falling, and where the controller is responsive to the sensor output to terminate the operation and to cause the non-volatile memory device to execute a non-volatile memory shutdown procedure.

28. A terminal as in claim 22, where an output of the sensor is coupled to the non-volatile memory device for indicating that the sensor has detected that the terminal is falling, and where the non-volatile memory device is responsive to the sensor output to terminate the operation and to execute a non-volatile memory shutdown procedure.

29. A terminal as in claim 22, where said terminal comprises a wireless communications device.

30. A computer program comprised of instructions to direct a computer, embodied in an enclosure, to be responsive to initiating an operation with a non-volatile memory device to activate a sensor that is capable of detecting that the enclosure is falling;

during the operation, to monitor the sensor to determine if the enclosure is falling and, if it is determined that the enclosure is falling, to terminate the operation and to execute a non-volatile memory shutdown procedure, else, if it is determined that the enclosure is not falling, to complete the operation and to deactivate the sensor.

31. A computer program as in claim 30, where the operation is at least one of a write operation and a read operation.

32. A computer program as in claim 30, where monitoring includes operating the sensor at a sampling rate that is selected based on the type of non-volatile memory device that the operation is directed to.

33. A computer program as in claim 30, where monitoring includes operating the sensor at a sampling rate that is selected based on an amount of time required to execute the non-volatile memory device shutdown procedure.

34. A computer program as in claim 30, where monitoring includes operating the sensor at a sampling rate that is selected based on a predetermined minimum threshold distance over which the enclosure can fall.

35. A computer program as in claim 30, where monitoring includes operating the sensor at a sampling rate that is selected to minimize sensor power consumption within constraints imposed by at least one characteristic of the non-volatile memory device that the operation is directed to.