Patent ID: 6585164
Filing Date: 2003-07-01
Classification: G06K,G06Q,G07F

Abstract:
A memory card, consisting essentially of:contacts for communicating with a terminal external to said card; a memory storing data that is transferred between the card and a terminal; address and control circuits that control the reading and writing of data from and to said memory; a signal receiving circuit that receives instruction signals from a terminal, generates messages in response to receipt of the instruction signals, and forwards codes contained within said instruction signals; an address register associated with said address circuit that stores address codes forwarded by said signal receiving circuit; a data register that stores control codes and data codes forwarded by said signal receiving circuit; a detector circuit that receives codes forwarded by said signal receiving circuit and selectively directs said codes to one of said registers; an output register that receives data read from said memory; and a transmission circuit that supplies data from said output register and messages generated by said signal receiving circuit to said contacts for transmission to a terminal.