| 摘要 |
An NFC (Near Field Communication) system is provided in the invention. The NFC system includes a power source, a capacitor, an NFC controller including an independent power domain, and a memory device disposed in the independent power domain. The capacitor is charged by the power source. The independent power domain of the NFC controller is supplied by the power source and/or the capacitor. The memory device is configured to maintain data. When the power source is removed therefrom or turned off, the independent power domain is supplied by the capacitor.
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