Card has integrated circuit comprising processor and contact pad unit connected with host by multiple contact pads, where host interface detector is formed to connect pull-up resistor and pull-down resistor with contact pad unit

摘要

The card has an integrated circuit comprising a processor and a contact pad unit connected with a host by multiple contact pads (C1-C8). A host interface detector is formed to connect a pull-up resistor and a pull-down resistor with the contact pad unit to detect the host interface condition. An interface unit comprises logic and is formed to implement interface protocol, where each interface protocol serves for communicating with the host. The signal of the host received from the host interface detector identifies the protocol and controls the interface unit.