SD記憶卡設計專利訴訟 USB Technologies控告SanDisk

A double interface flash memory card, which has a first transmission interface and a circuit board with a microprocessor and a plurality of flash memory thereon, comprising:
一種雙介面快閃記憶卡，其具有一第一傳輸介面及有一微處理器和一群快閃記憶體於其上之一電路板，包含：

a first bus interface circuit especially for a system interface circuit of the flash memory card being able to perform signal transmission;
一第一匯流排介面電路，尤指為該快閃記憶卡的一系統介面電路能夠執行信號傳輸者；

a second bus interface circuit for the other information apparatuses, which are different from the flash memory card, being able to perform signal transmission; and
一第二匯流排介面電路，為不同於快閃記憶卡之其它資訊設備能夠執行信號傳輸者；及

an interface detection and switching circuit, electrically connecting with the first transmission interface, the first bus interface circuit and the second bus interface circuit for detecting if there is an initializing signal generated from the system interface circuit and switching to the first bus interface circuit or the second bus interface circuit according to the initializing signal being generated or not generated;
一介面偵測和切換電路，與該第一傳輸介面、該第一匯流排介面電路和該第二匯流排介面電路電連接，用來偵測是否有一初始信號從該系統介面電路被產生及依據該初始信號是否被產生而切換至該第一匯流排介面電路或該第二匯流排介面電路；

wherein, the microprocessor switches the status thereof to a working mode and a suitable system interface circuit mode is started according to what type of the system interface circuit being detected by the interface detection and switching circuit so that the microprocessor can detect, determine and support a connection action signal automatically; when either the first transmission interface or the second transmission interface offers the action signal at the transmission end thereof and, in the mean time, the microprocessor switches the circuit and the related electronic elements on the circuit board to support data transmission action of the first transmission interface or the second transmission interface in the flash memories.
其中，該微處理器切換其狀態至工作模式及依據該介面偵測和切換電路所偵測之該系統介面電路的型態而一適合系統介面電路模式被啟動，使得該微處理器自動地可偵測、決定和支援一連接主動信號；當不是該第一匯流排介面電路就是該第二匯流排介面電路於其傳輸端提供該主動信號，及在此同時，該微處理器切換該電路板上之該電路和該相關電子元件，來支援該群快閃記憶體中之該第一匯流排介面電路或該第二匯流排介面電路的資料傳輸動作。