基于USB接口的IC卡读写器

针对使用RS232接口与主机进行通信时存在的不足,提出了一种基于USB接口的IC卡读写器,阐述了对于存储式IC卡(24C01)利用I2C总线读取和写入数据的过程,给出了USB接口芯片PDIUSBD12和PC机之间的通信过程,描述了USB固件编程的构架,介绍了功能驱动开发的方法·该IC卡读写器使用USB接口和主机进行通信,支持即插即用功能,明显地提高了主机和IC卡读写器之间的数据传输速率,保证了系统的可靠性和便携性要求·该IC卡读写器研制成功并投入使用,在实际应用中证明了其价值·

Research and Implementation of IC Card Read-Write Device with USB Interface

Introduces a new solution to the problem of communication between host and IC card read-write device using RS232 interface by way of using USB interface instead. Describes the process how to read and write data through IC card using the I~2C bus protocol and the communication process between the USB interface chip PDIUSBD12 and PC host. Explains the USB architecture of firmware and the way to develop the function driving program. The IC card read-write device uses USB interface to communicate with host and supports the function of plug & play, thus improving obviously the data transmission rate and ensuring the reliability and portability of the system. The device has been developed and put into applications successfully with its practicability proved.