# Get/Set BitMode 
use constant PFT_BITMODE_RESET => 0x00;
use constant PFT_BITMODE_ASYNCBB => 0x01;
use constant PFT_BITMODE_MPSSE  => 0x02;
use constant PFT_BITMODE_SYNCBB => 0x04;
use constant PFT_BITMODE_MHBEM => 0x08;
use constant PFT_BITMODE_FOISM => 0x10;
use constant PFT_BITMODE_CBUSBB => 0x20;

##</code><code>##

#
# assuming you called OpenByIndex on this object already
#
$mode = $FTDIdev->SetBitMode(0xFF, 0x01);