Abstract: This paper introduces the system design of IC card reader/writer based on PIC16C74 single-chip microcomputer. The system realizes the reading and writing of IC card and external memory, the serial communication between PC and single-chip microcomputer, and the serial port power supply working mode in hardware. The system has the characteristics of strong practicality and high stability. Keywords: PIC single-chip microcomputer; IC card reading and writing; serial communication; serial port power supply
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