Old man, recently there is a small project need two serial ports, the younger brother will only use 52, don't use 12 so you have to a serial port expansion, dear brother see this method is feasible? And I am using CMOS4081 door, thank you!

CodePudding user response:

Theoretically possible, actual never operating
There is a way can be realized, bus form, such as a frame of data 8 bytes, can pass the first byte value judgment is send a RXD1 or send RXD2, RXD1 and RXD2 receiving data, only judgment is their data to do the corresponding response

CodePudding user response:

reference 1st floor bowstring arrow shadow response:

theoretically possible, actual never operating
There is a way can be realized, bus form, such as a frame of data 8 bytes, can pass the first byte value judgment is send a RXD1 or send RXD2, RXD1 and RXD2 receiving data, only is your data to make a corresponding response

Is behind the two modules to judge ah