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MSP430G2 LaunchPad上的J3跳线组有什么用?

在G2系列的LaunchPad上,有一组J3,请问一下其中的RXD和TXD,将他们他们的跳线帽横着接或竖着接分别有什么区别?分别在哪种情况下使用?烦请解答,谢谢!

  • SW UART 软件UART,HW UART 硬件UART

    一般SW UART是用来下载程序的。下载好串口程序,改成HW UART后,可以用串口助手之类的软件和mcu通讯