The use of MSC-51 Series MCU AT89C52 as a central processing unit to AT24XX series of chips for the memory card. 4x4 determinant using keyboard keyboard, Seven-Segment LED display module using a digital display tube. 51 single-chip microcomputer to control the selection of the circuit, single-chip and IC card, button, display tube connection. MCU to read the IC card information, microcontroller has been scanning button, if keys are single-chip sensor and the IC card to query or modify the content, single-chip at this time through the display circuit to display the IC card in the process of amending the information or query information.

proc
....\ICRdWr.c
....\ICRdWr.h
....\ICRdWr.LST
....\ICRdWr.OBJ
....\ICRdWrPro
....\ICRdWrPro.lnp
....\ICRdWrPro.M51
....\ICRdWrPro.Opt
....\ICRdWrPro.plg
....\ICRdWrPro.Uv2
....\ICRdWrPro_Opt.Bak
....\ICRdWrPro_Uv2.Bak
电路原理图
..........\ICRdWr.Sch

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