Patent ID: 7150397
Filing Date: 2006-12-19
Classification: G06F,G06K

Abstract:
1. A dual mode smart card controller, comprising USB card identify logic capable of polling C4 and C8 signals, defined by the USB specification, to determine if an ISO7816 smart card or a USB smart card is inserted into a socket, said USB card identify logic is further capable of masking the presence of a USB smart card from ISO7816 card detect logic; a USB hub circuit comprising a USB host controller USB hub circuit or a downstream USB hub having an upstream USB port, said USB hub circuit is capable of providing input and output commands to said USB smart card; and signal filter circuitry capable of monitoring said C4 signal line to determine if said C4 signal line is logic high for more than a time period, and wherein if said C4 signal line is logic high for more than said time period, then control of a smart card is passed to a USB hub circuit.