Method for determining transmitting mode of a memory card with multiple interface functions

A memory card with multiple interface

• functions, comprising:
• a data storage medium;
• a multiple interface controller comprising a memory card protocol processor connected to said data storage medium through a data r/w controller;
• and
• a shared interface bus connected to said memory card protocol processor and a host system respectively, said shared interface bus being compatible with a plurality of transmission interface protocols, said protocol processor selecting a transmitting mode including one of a serial transmitting mode, a first flash memory card transmitting mode, a second flash memory card transmitting mode and a third flash memory card transmitting mode for communication between said multiple interface controller and said host system through a mode detector/switch;
• whereby selecting a transmission mode comprises the steps of:
• waiting to receive a shared flag for indicating one of the first, second, or third flash memory transmitting modes;
• detecting whether a waiting time to receive said shared flag has exceeded a predetermined time threshold;
• if not, continue waiting to receive said shared flag;
• if yes, executing said serial transmitting mode;
• determining whether a response flag for said third flash memory card transmitting mode has been received;
• if yes, executing said third flash memory card transmitting mode;
• and
• determining whether a response flag for said first flash memory card transmitting mode has been received;
• if yes, executing said first flash memory card transmitting mode;
• if not, executing said second flash memory card transmitting mode.