8051 系列芯片通常只有1 个或2 个串口,在工程实际中,往往需要多个串口进行整个系统的通信,但是普通单片机或者DSP 原有的UART 串口都比较少。GM8125可以将1 个全双工的标准串口扩展成5 个全双工的标准串口,并能通过外部引脚控制串口扩展模式:单通道工作模式或多通道工作模式。-8051 series chips are usually only one or two serial ports, in engineering practice, often requires a number of serial communications for the entire system, but an ordinary single-chip DSP, or the original less than the UART serial port. GM8125 can be a standard full-duplex serial port expansion into the standard five full-duplex serial port, and can control external pin serial port expansion mode: single mode or multi-channel mode.