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CCID (USB (universal serial bus) chip/smart card interface devices) protocol processing circuit

A protocol processing and circuit technology, applied in the field of electronic information, can solve the problems of inconvenient use for customers, inconsistent communication protocols, etc., and achieve the effect of convenient operation

Inactive Publication Date: 2012-01-11
上海哈诚电子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the IC card readers on the market are based on serial communication, and are produced by many manufacturers. The communication protocols are not uniform, which brings inconvenience to customers.

Method used

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  • CCID (USB (universal serial bus) chip/smart card interface devices) protocol processing circuit
  • CCID (USB (universal serial bus) chip/smart card interface devices) protocol processing circuit
  • CCID (USB (universal serial bus) chip/smart card interface devices) protocol processing circuit

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Embodiment Construction

[0015] The present invention will be further described now in conjunction with accompanying drawing.

[0016] see figure 1 , the present invention includes STM32F103CBT6 processing chip, serial port chip, IC card reader, USB interface of PC, crystal oscillator, capacitor, resistor and CCID protocol processing software. The interfaces PD0 / OSC_IN and PD1 / OSC_OUT of the STM32F103CBT6 processing chip are respectively connected to the two ends of the crystal oscillator, and the two ends of the crystal oscillator are respectively connected to a 20pF capacitor and grounded to form an external crystal oscillator circuit; the interface USBDM(2)PA11 of the STM32F103CBT6 processing chip is connected to the 22Ω After the resistor is connected, the D-line of the USB interface of the PC is connected, and the interface USBDP(2)PA12 of the STM32F103CBT6 processing chip is connected with the D+ line of the USB interface of the PC after the 22Ω resistor is connected to form a USB communication ...

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PUM

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Abstract

The invention relates to the field of electronic information technologies, and particularly relates to a CCID (USB (universal serial bus) chip / smart card interface devices) protocol processing circuit which comprises an STM32F103CBT6 processing chip, a serial port chip, an IC (integrated circuit) card reader-writer, an USB interface of a PC (personal computer), a crystal oscillator, a capacitor, a resistor and CCID protocol processing software. Compared with the prior art, the invention has the advantages that the USB interface is used for communicating with the PC, and a serial port is used for communicating with an original serial port IC card reader-writer, thereby transforming the serial communication of the IC card reader-writer to the USB communication; and the CCID protocol processing software is utilized to virtualize an IC card socket into different CCID devices, thereby realizing the independent operation of the devices and facilitating the operation of a user.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a CCID protocol processing circuit. Background technique [0002] Due to the strong confidentiality and large capacity of IC cards, IC cards have been more and more widely used, and have been involved in many fields such as finance, insurance, transportation, and social security. Correspondingly, the number of IC card readers on the market is also very large. [0003] The CCID standard stipulates that CCID (USB Chip / Smart Card Interface Devices) is a chip / smart card interface device. The device is connected to the PC through the USB interface to perform data communication in accordance with the CCID standard. At the same time, the device communicates with the smart card through the interface. Microsoft provides and supports CCID drivers on its Windows 2000 and above operating systems. The CCID interface standard supports PC (Personal Computer-personal computer) / SC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42
Inventor 陈中元
Owner 上海哈诚电子科技有限公司
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