| 摘要 |
FIELD: information technology.SUBSTANCE: device of a USB-switch includes a protection microcircuit; a synchronisation circuit and a clock frequency generator connected to the protection microcircuit; a circuit of a USB interface to the first contact D+ and the first contact D-, which are connected to the protection microcircuit; an IO interface circuit with a bidirectional interface and the first input interface, which is connected to the protection microcircuit; a USB interface with the second contact D+ and the second contact D-, in which the second contact D+ is connected to the first contact D+ of the USB interface circuit; the second contact D- is connected to the first contact D- of the USB interface circuit; the second contact D+ is connected to the bidirectional interface or the first input interface, and the second contact D- of the USB interface is connected to the first input interface or the bidirectional interface respectively; and interface processor connected to the USB interface circuit and the IO interface circuit and configured for the determination of the bidirectional interface level after installation of the bidirectional interface to the input mode and for the connection or disconnection of the USB interface circuit depending on the bidirectional interface level.EFFECT: enlarging functional capabilities due to interaction of a USB-switch with a smart card readout device.10 cl, 6 dwg |
