A universal asynchronous receiver/transmitter, abbreviated UART ( /ˈ juː ɑrt/), is a type of "asynchronous receiver/transmitter", a piece of computer hardware that translates data between parallel and serial forms. UARTs are commonly used in

单片机开发用芯片，用于电平转换，学名MAX232-The MAX232 device is a dual driver/receiver that includes a capacitive voltage generator to supply EIA-232 voltage levels from a single 5-V supply