As was discussed in previous post, I'd like to connect RS232 cable to a level converter (the main goal is to have the PC interfacing a microcontroller).
Could you help me complete the level converter's column (ICL3223)?
Without a specific reason or application a lot of hobbyists and DIYers use only the TxD and RxD pins. You probably don't need the other pins connected and if you're using a hardware UART on a microcontroller chances are they're not supported any way. On the ICL3223 tie any unused inputs high or low as per the datasheet and nothing more need be done.
See... that is the most confusing part about RS232. Which end is DCE and which is DTE. In the old days, the computer was the DTE and the modem was DCE. At any rate, RTS is an output from DTE and CTS is input on DCE.
What you just said settles with what I just read in Wiki - the RTS originates from the DTE (PC) and the CTS originates from the DCE (levels converter).
Besides the 4 pins - RxD, TxD, RTS, CTS - are there any other pins that should be connected between RS232 and the levels converter?