Hi,

Please see the attached image.

I have three devices with only UART in all three devices

I need to communicate with all three devices at the same time using one USB

I have see USB to UART using FTDI converter . But that is for one to one.

Here one USB to 3 UART I need to connect. Is it possible ?

I saw one FTDI device FT4232H and the datasheet says "Single chip USB to four channels UART (RS232, RS422 or RS485) or Bit-Bang interfaces. "

can I use this device for my application ?

If yes, then how do I interface AD,BD,CD,DD Bus0 to Bus 7 to my device which has got only tx rx, Do I need any interface IC?

Also I know RS232 is multi drop. Can I use RS232 for this sort of communication ?

 

Check out this datasheet also... https://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT4232H.pdf Starting on the bottom of page 13 it shows the different pins functions. Judging from your post I think you have https://www.ftdichip.com/Support/Documents/DataSheets/Modules/DS_FT4232H_Mini_Module.pdf already. Match up the tables between the two.

I'm assuming in the "normal" mode the driver would just create four virtual ports like a normal serial port to use to connect with in program.