硬件设置小工具，电阻值计算excel，表列出了常用电阻值，只需要输入电源电压，需要电压俩个电压值，就可以算出分压电阻，误差5 以内会有绿色标注-Hardware settings gadgets, resistance calculation excel, table lists the commonly used resistance, only need to input power supply voltage, the need to voltage two voltage values

Check the clock frequency & that the baud rate required can be achieved. Error of <1 is never a problem, <2 will work but is undesirable, 5 will not work. Note that this assumes that the other end of the link has perfect timing, which will norm