On Wed, Dec 8, 2010 at 11:15 AM, Philippe Houdoin <philippe.houdoin@xxxxxxxxx> wrote: >> It actually says RTS and DTR, so it isn't the same value - maybe this had >> another reason? > > Michael has splitted the RTS and DTR line control request into two > distinct requests for FTDI, one per signal. As stated in FTDIRegs.h file: "* Also - you can not set DTR and RTS with one control message".