Method and apparatus for erasing memory data

摘要

A memory erasing method and apparatus for erasing important data of a nonvolatile memory within the apparatus to prevent illegal access using attitude information measured in an inertial measurement sensor and a low power microprocessor regardless of the power supply state of the apparatus. The apparatus includes a power switching circuit unit for selecting one from among an external power source and a battery. An inertial measurement sensor measures attitude information of the memory erasing apparatus, using power supplied from the external power source or the battery. A low power microprocessor erases important data from a memory device in a first manner using power from the external power source, and in a second manner using power from the battery, the first manner being different from the second manner.

主权项

1. A method for erasing memory data, comprising:
determining, by a low power microprocessor, which of external power and battery power is supplied for measuring attitude information from an inertial measurement sensor; erasing, by the low power microprocessor, important data from a memory device in a first manner if the external power is determined to be supplied; and erasing, by the low power microprocessor, the important data from the memory device in a second manner if the battery power is determined to be supplied, the first manner being different from the second manner, wherein erasing the important data from the memory device in the second manner comprises: checking, by the low power microprocessor, the attitude information from the inertial measurement sensor using the battery power whenever a timer event occurs while the low power microprocessor is operating in a standby state; comparing the attitude information from the inertial measurement sensor with a predetermined threshold value; and blocking the battery power from being supplied to the memory device to erase the important data from the memory device if results of the comparison are consistent with a predetermined determination condition for erasing memory data.