F232 is USB powered

Posted on Feb 5, 2014

F232 is USB powered, but you need to have a level translator at the output of F232. Tx of f232 has to be converted to RS232 levels, since the other side has a max. Receive pin can be easily opto-ed. But the transmit pin, need to have a supply in line with RS232 levels. Sometimes we d it by making a higher supply from the remote RS232 chip - a comm

F232 is USB powered
Click here to download the full size of the above Circuit.

on method, if you are in control of the remote max pin. Here is the circuit. I modified the circuit to replace rs232 chip with MAX232 to the board sold by FTDI guys. FTDI has got circuit + gerbers in their site. I did not use their gerbers. Got a layout made by someone.

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