Currently, USB replaces all those legacy ports and you rarely find them in modern PCs.Ĭompared to USB protocol, dealing with the serial port protocol is straightforward with regard to hardware and software. Legacy ports such as parallel ports, serial ports, PS/2 or game ports were found in early PCs. ![]() To interface a PC to the external world for control and monitoring applications, the computer requires an external I/O interface. ATSTAMP is an MCS-51 (8051)-compatible microcontroller chip that can be connected to the USB port of any PC via any USB-to-serial bridge currently available on the market. In this project article, Hossam describes his ATSTAMP design. But many of those interfaces are still used in control and monitoring embedded systems. Versatile Solution In PCs, serial interfaces have now been replaced almost completely by USB.
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