Portable electronic device and core swapping method thereof

A core swapping method of a portable electronic device, wherein the portable electronic device comprises a multi-core cluster, which includes a first processing core operating at a first frequency and a second processing core operating at a second frequency, a third processing core operating at a third operating frequency, a power management unit, a first switch and a second switch, wherein a power consumption of the first processing core is larger than a power consumption of the second processing core, and the power consumption of the second processing core is larger than a power consumption of the third processing core, the method comprising:

• providing a first voltage and a second voltage by the power management unit;
• determining whether the third processing core is enabled or disabled;
• when it is determined that the third processing core is enabled, switching the second switch to receive the first voltage and provide the first voltage to power the second processing core and switching the first switch to receive the second voltage and provide the second voltage to power the third processing core;
• and
• when it is determined that the third processing core is disabled, switching the second switch to receive the second voltage and provide the second voltage to power the second processing core and switching the first switch to stop providing the second voltage to the third processing.