Power control methods for a portable electronic device
A power control method for a portable electronic device. The portable electronic device comprises a power supply unit and a volatile memory for storing data when the power supply unit supplies power thereto. First, the portable electronic device is set to enter a deep sleep mode. Then, data accessed from the volatile memory is transferred to a non-volatile memory. Finally, except for maintaining sufficient power to restore the device, the power supply unit is turned off.
1. A power control method for a portable electronic device, which has a processor for processing data, a non-volatile memory, a volatile memory for storing data, and a battery for supplying power to the processor, the non-volatile memory and the volatile memory, the method comprising:
storing data from the volatile memory into the non-volatile memory and stopping supplying power to the volatile memory when the remaining power of the battery is less than a predetermined amount;
maintaining only sufficient power to restore the device;
determining whether the remaining power of the battery exceeds an amount required for a normal device operation; and
when the remaining power of the battery exceed the amount, supplying power to the volatile memory and accessing data from the non-volatile memory to initiate the normal device operation; and
determining whether a specific input signal has been received by the portable electronic device; and
supplying power to the volatile memory upon receiving the specific input signal and accessing data from the non-volatile memory to initiate the normal device operation after initialization.
2. The power control method as claimed in claim 1 further comprising:
stopping supplying power to the processor and the non-volatile memory after storing data from the volatile memory into the non-volatile memory.
3. The power control method as claimed in claim 1 , further comprising:
restoring the device and resuming all power before the supplying and accessing steps.
4. The power control method as claimed in claim 1 further comprising:
stopping supplying power to the processor and the non-volatile memory after storing data from the volatile memory into the non-volatile memory;
determining whether a specific input signal has been received by the portable electronic device; and
when the specific input signal has been received by the portable electronic device, supplying power to the processor, the non-volatile memory and the volatile memory and accessing data from the non-volatile memory to initiate the normal device operation.