Method for improving communication rate of contact-type intelligent card

A technology of communication rate and smart card, which is applied in the direction of cooperative devices, instruments, computer parts, etc., can solve the problems affecting the demand of data transmission, etc., and achieve the effect of increasing processing time, improving stability and processing efficiency

Active Publication Date: 2011-07-13
BEIJING HUAHONG INTEGRATED CIRCUIT DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, contact smart cards mostly use traditional implementation mechanisms, and there are many problems in the coordination of software and hardware. The communication data rate can only reach a maximum rate of 112kbps, which greatly affects the data transmission requirements in applications.

Method used

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  • Method for improving communication rate of contact-type intelligent card
  • Method for improving communication rate of contact-type intelligent card
  • Method for improving communication rate of contact-type intelligent card

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Embodiment Construction

[0019] Below in conjunction with each accompanying drawing, content of the present invention is described in detail:

[0020] image 3 For the character transmission format specified in the ISO / IEC 7816 standard, each byte transmission includes a start bit, 8 data bits, parity bits, and waiting time. The start bit is a low level of one bit time, the waiting time is a high level of two bit times, and the time required to send a complete byte is 12 bit times. The start bit represents the start of data transmission. After receiving the start bit, the receiver starts to receive the data, and verifies the correctness of the data according to the parity bit. If it is not correct, it requires retransmission.

[0021] figure 1 It is a schematic diagram of a method for improving the communication rate of a contact smart card provided by the present invention, figure 2 It is a module diagram of the ISO / IEC 7816 standard interface involved in the present invention, including a mode c...

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Abstract

The invention provides a method for improving communication rate of a contact-type intelligent card, which comprises the following steps of: performing data transmission by adopting a mode that a hardware circuit control logic unit automatically switches receiving and transmitting of data; implementing data caching by adopting a first-in first-out (FIFO) mode in the transmission process, and independently controlling FIFO receiving and FIFO transmitting respectively; and generating an interrupt once a byte is accurately received when the data are received, and generating an interrupt after the data in all caches are totally accurately transmitted when the data are transmitted. By adopting the mode that the hardware circuit control logic unit automatically switches receiving and transmitting of the data, the communication rate of the contact-type intelligent card is not affected by the application software processing rate in the card, so the time of processing the software in the card can be increased, and the stability and the processing efficiency of the application software of the intelligent card can be effectively improved.

Description

technical field [0001] The invention relates to a method for increasing the communication rate of an integrated circuit, in particular to a method for increasing the communication rate of a contact smart card. Background technique [0002] IC card (integrated circuit card) or smart card is a plastic card with the size of a credit card, and an integrated circuit chip module including storage encryption and data processing capabilities is packaged in the card. IC card has the characteristics of anti-magnetic, anti-static, anti-destructive and durable, good anti-counterfeiting, large storage data capacity, high security, low cost of application equipment and system network environment, and mature technical specifications. As smart cards enter people's daily life applications, such as consumer cards, social security cards, bus cards, etc., their extremely high security has now attracted more and more attention from people, and has replaced magnetic cards in more and more fields....

Claims

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Application Information

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IPC IPC(8): G06K17/00
Inventor 薛平
Owner BEIJING HUAHONG INTEGRATED CIRCUIT DESIGN
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