Sequential control method and card reader

A timing controller and timing control technology, applied in the field of smart cards, can solve the problems affecting the communication efficiency between the IC card reader and the IC card, the high communication error rate between the IC card reader and the IC card, and the firmware of the IC card reader. Problems such as complex program design, to achieve good portability, reduce complexity and communication bit error rate, and achieve the effects of precise timing control
CN101789069BActive Publication Date: 2012-06-27FEITIAN TECHNOLOGIES
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
FEITIAN TECHNOLOGIES
Publication Date
2012-06-27

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Abstract

The invention discloses a sequential control method and a card reader, and belongs to the technical field of intelligent cards. The sequential control method comprises that: when the card reader detects a falling edge of a transmission signal, a sequential controller is started; when the sequential controller reaches a first preset control value, the level of the intelligent card is sampled to serve as a first bit position, and if the level is a low level, the data is continuously received, otherwise the data receiving is ended; when the sequential controller reaches a second control value toa ninth preset control value, the level is sampled in turn to serve as a second bit position to the ninth bit position in turn according to the agreed protocol and the bit positions are spliced into a data byte for saving; and when the sequential controller reaches a tenth preset control value, the level is sampled to serve as a tenth bit position, and the saved data byte is checked by using the tenth bit position according to the preset check mode. The card reader comprises a sequential control module, a sampling module, a judging module, a storage module and a check module. The sequential control method and the card reader realize more accurate sequential control.
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Description

technical field

[0001] The invention relates to the technical field of smart cards, in particular to a timing control method and a card reader. Background technique

[0002] IC card (Integrated Circuit Card, integrated circuit card) is another new type of information tool that has appeared after the magnetic card. The IC card stores information through the integrated circuit in the card. IC cards are also called smart cards, intelligent cards, microcircuit cards or microchip cards in some countries and regions. It is made in the form of a card by embedding a microelectronic chip in a card base conforming to the ISO 7816 standard. At present, IC cards have been widely used in many fields including finance, transportation, social security and so on.

[0003] The IC card reader is the bridge between the IC card and the application system, which is called IFD (Interface Device) in the ISO international standard. The CPU in the IFD is connected and communicated with the IC car...

Claims

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