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用89C51串行口外接CD4094移位寄存器扩展8位并行口，8位并行口的每位都接一个发光二极管，要求发光二极管从左到右以一定延迟轮流显示，并不断循环。-Using 89C51 external serial port expansion CD4094 shift register 8-bit parallel port, 8-bit parallel port of each one, all light-emitting diodes, light emitting diodes requir
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AT89S51的并行口P1接4×4矩阵键盘，以P1.0－P1.3作输入线，以P1.4－P1.7作输出线；在数码管上显示每个按键的“0－F”序号。-AT89S51 the parallel port P1 then 4 × 4 matrix keyboard to P1.0-P1.3 as input lines to P1.4-P1.7 for output line in the digital control button displayed on each of the " 0-
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24bitAD数据采样进行串并转换，并行输出。另包括24位DA并串转换，串行输出。-24bitAD data sampling and converted to strings, parallel output. Other notable features include 24-bit DA and string conversion, serial output.
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利用单片机和串行移位输入、八位并行带锁存输出芯片的基本功能设计出驱动LED组成大屏幕显示屏，实现对需要参数的显示-Microcontroller and serial shift input and eight parallel with the basic functions of the latch output chip designed to drive LED composed of large-screen display, the display parameters need
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并行led驱动信号改为串行驱动TM1628，-Parallel signals to serial driver led driver TM1628,
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AT89C2051针式打印机驱动模块，将2051串口接收到的数据转换后发送到连接打印机的并口上。-AT89C2051 dot matrix printer driver module, after the 2051 serial convert the received data is sent to the printer s parallel port connection.
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利用MCS-51单片机的串行口和串行输入并行输出移位寄存器74LS164，扩展二个8位输出通道，用于驱动二个数码显示器，在数码显示器上循环显示从8031串行口输出的0—9这10个数字。-Use MCS-51 microcontroller serial port and the serial input parallel output shift register 74LS164, extend two 8 output channels to drive two digital display
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