Back to results
US 6,149,058 AGranted
Chip card reader with fast transmission protocol
AssigneeSTMicroelectronics S.r.l.
InventorThierry Albaret
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSTMicroelectronics S.r.l.
InventorThierry Albaret
Estimating the term…
A chip card reader may be connected to a microcomputer to provide for data exchanges in the read or write mode between the card and the microcomputer, under the control of the microcomputer. The reader is capable of carrying out data exchanges between the card and the microcomputer and works without a microprocessor. The chip card reader is provided, firstly, with a data buffer memory enabling the temporary storage of the pieces of data read in the card, and, secondly, with a frequency divider programmable by a frequency signal to set the bit time at will. By the division of frequency of an internal clock of the reader, this bit time is the duration corresponding to the transmission of a data bit in the data exchanges between the chip card and the reader. The reader can then carry out transmissions with slow or fast protocols independently of the microcomputer.
A chip card reader, for operating under control of a microcomputer of a type comprising an output bus, to provide for data exchanges between a chip card and the microcomputer, the chip card reader comprising:
A chip card reader, for operating under control of a microcomputer to provide for data exchanges between a chip card and the microcomputer, the chip card reader comprising:
A chip card reader, for operating under control of a microcomputer to provide for data exchanges between a chip card and the microcomputer, the chip card reader comprising:
A method for reading a chip card using a chip card reader operating under control of a microcomputer to provide for data exchanges between the chip card and the microcomputer, the method comprising the steps of:
Dependencies are inferred from the claim text.