Method for avoiding data loss in a PDA
OwnerHung-Chang Hung, Yu-Pao Huang +4inventors
InventorsHung-Chang Hung, Yu-Pao Huang, Liang-Hsin Chien, Chien-Wen Chen, Ming-Chih Hsieh, Chi-Chung Yu
Life of this patent
Estimating the term…
Abstract
A method for avoiding data loss in a PDA. The PDA has a RAM, a battery, a central processing unit (CPU), and a nonvolatile accessible memory. The nonvolatile accessible memory has a predetermined region, and the RAM stores user information including global operating system settings. User information is backed up into the predetermined region when remaining power of the battery is lower than a default value. Further, user information from the predetermined region is restored to the RAM when system power is recovered.
Claims21
A method for avoiding data loss in a PDA, wherein the PDA has a RAM to store user information, a battery to power the PDA, a CPU, and a nonvolatile accessible memory with a predetermined region, the method comprising:
- backing up user information stored in the RAM into the predetermined region when remaining power of the battery is lower than a default value;
- and
- restoring user information from the predetermined region to the RAM when system power is recovered.
A method for avoiding data loss in a PDA, wherein the PDA has a RAM to store user information, a battery to power the PDA, a CPU, a nonvolatile accessible memory to store preset data, and a user interface to output an enable signal and a recovery signal, wherein the nonvolatile accessible memory has a predetermined region, the method comprising:
- backing up user information stored in the RAM into the predetermined region in response to the enable signal;
- and
- restoring user information from the predetermined region to the RAM in response to the recovery signal.
A PDA capable of avoiding data loss, comprising:
- a nonvolatile accessible memory having a predetermined region;
- a RAM to store user information;
- a battery to power the PDA;
- and
- a power detection unit to output an enable signal when remaining power of the battery is detected as lower than the default value, and to output a recovery signal when remaining power of the battery exceeds the default value.
A PDA capable of avoiding data loss, comprising:
- a nonvolatile accessible memory storing preset data and programs;
- a RAM to store user information;
- an external flash memory having a predetermined region;
- a battery to power the PDA;
- a power detection unit to output an enable signal when remaining power of the battery is detected as lower than a default value, and output a recovery signal when remaining power of the battery exceeds the default value;
- and
- a CPU coupled to the nonvolatile accessible memory, the RAM and the external flash memory, to back up user data stored in the RAM to the predetermined region when receiving the enable signal and to restore user information to the RAM when receiving the recovery signal.
A method for avoiding data loss in a PDA, wherein the PDA has a RAM to store user information, a battery to power the PDA, and a nonvolatile accessible memory to store preset data, and the nonvolatile accessible memory has a predetermined region, the method comprising:
- backing up user information stored in the RAM to the predetermined region in response to voltage variation of the battery.
Dependencies are inferred from the claim text.