Multiple uses KEY device with NFC function
A multi-application and functional technology, which is applied in the recording carrier used by the machine, the start-up of the code identification card or credit card, and the instrument, can solve the problems of USBKEY single performance and poor wireless communication compatibility, etc., to achieve convenient and flexible application and guarantee safety effect
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[0032] Example 1
[0033] As shown in Figure 1, a multi-application KEY device with NFC function, the connection relationship of each functional module in the device 1 is: the cos control unit in the device is connected to the test logic unit, the security logic unit, and the storage manager through the system bus. , NFC unit and ISO7816 interface control unit are connected and perform data exchange. Among them, the storage manager is divided into ROM management, RAM management and EEPROM management to manage the on-chip ROM, RAM, and EEPROM respectively; the test logic unit is used to test internal circuits in production; the security logic unit contains a computing coprocessor , Complete DES, 3DES and other operations; NFC unit realizes NFC communication with external devices; ISO7816 interface control unit is used to control ISO7816 interface to realize data exchange in accordance with ISO7816 specifications with peripherals. The storage manager is connected to ROM, RAM and EEP...
Example Embodiment
[0036] Example 2
[0037] As shown in Figure 4, the difference between the device of this embodiment and the above example is that the ISO interface control unit in the above example is changed to a USB interface control unit, and a bus conversion unit is also provided on the system bus; a universal input / output port and The USB interface is respectively connected to the bus conversion unit through the peripheral bus, and is respectively connected to the external pins to realize the data exchange between the device and the peripheral; the USB interface control unit is used for mutual conversion of the system bus and the relevant data in the USB interface.
[0038] The storage manager is connected to ROM, RAM and EEPROM through the system bus to realize their management. ROM is used to store cos code; RAM is used to store temporary variables, process data and other information when the device is running; EEPROM is managed by cos and is used to store mobile certificates, functions, ...
Example Embodiment
[0039] Example 3
[0040] As shown in FIG. 5, in this embodiment, on the basis of Embodiment 2, a Flash chip is also connected to the system bus; a Flash management part is provided in the storage manager to manage the on-chip Flash.
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