Double interface SD flash memory card

1. A double interface flash memory card, comprising:

• a first transmission interface; and
  
  a circuit board, providing a microprocessor and a plurality of flash memories, the microprocessor having at least a built-in first bus interface circuit;
  
  wherein the first bus interface circuit further comprises an adaptor, having an interface socket for being inserted with said first interface; and
  
  a second transmission interface for being used with other information apparatuses;
  
  a second bus interface circuit, being built in the microprocessor; and
  
  an interface detection and switching circuit, being built in the microprocessor;
  
  whereby, the interface detection and switching circuit can detect and switch the first and the second transmission interfaces and the microprocessor can detect, identify, and support the first interface or the second interface so that when a signal is sent from the first interface or the second interface, the microprocessor will switch the circuit and relevant electronic elements in the circuit board to support the first interface or the second interface to access the data in the flash memories on the card.