Data communication device and method of a smart card

Details Data communication device and method of a smart card Data communication device and method of a smart card

1995-10-02

1998-03-17

Hajec, Donald T.

Registers

Records

Conductive

235375, 235382, 902 26, G06K 1906

Patent

active

057290040

ABSTRACT:
An input/output device of a smart card according to the present invention comprises a first register having a serial input terminal connected to a terminal serial input/output; a second register having parallel detection terminals, parallel input/output terminals connected to a data bus, and a serial input terminal connected to a serial output terminal of the first register; a third register having a parallel input terminal connected to a ground, a serial input terminal connected to a serial output terminal of the second register, and a serial output terminal connected to the terminal serial input/output; a parity generator which receives parallel output data from the parallel detection terminals of the second register, logically operates upon the parallel output data to generate an operation parity bit which is applied to a parallel input indicator terminal of the first register; and a parity detector which receives a reception parity bit from the first register and the operation parity bit from the parity generator and, in a reception mode, compares the logic states of the reception parity bit and the operation parity bit to obtain a parity detection signal indicating whether parity is correct.

REFERENCES:
patent: 4906828 (1990-03-01), Harpern
patent: 4908038 (1990-03-01), Matsumura et al.
patent: 5109152 (1992-04-01), Takagi et al.
patent: 5148543 (1992-09-01), Tamada et al.
patent: 5149945 (1992-09-01), Johnson et al.
patent: 5227613 (1993-07-01), Takagi et al.
patent: 5365047 (1994-11-01), Yamaguchi
patent: 5418353 (1995-05-01), Katayama et al.
patent: 5428684 (1995-06-01), Akiyama et al.
patent: 5539825 (1996-07-01), Akiyama et al.
patent: 5541985 (1996-07-01), Ishii et al.
patent: 5550919 (1996-08-01), Kowalski

Affiliated with

Also associated with

Rating

Data communication device and method of a smart card does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data communication device and method of a smart card, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data communication device and method of a smart card will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-960118