Multi-functional electronic card capable of detecting removable cards

A multi-functional electronic card capable of detecting removable cards comprising:

• at least one functional device;
• a controller having a status register and a device detecting pin;
• a host interface for inserting into a host device, the host interface having a card detecting pin fixed at a level representing that a card is inserted;
• and
• a removable card interface for being inserted with a removable card with other functional device, the removable card interface having an elastic switch connected to the device detecting pin of the controller, the elastic switch being on or off due to insertion or removal of the removal card so as to change a level of the device detecting pin;
• wherein the controller detects event and status of a card insertion and removal by a level change of the device detecting pin for being set in the status register, and informs the host device through the host interface so that the host device reads the status register to determine whether the removable card is inserted or removed.