how to use FTDI chip TTL-232R-3V3, USB to TTL Serial Cable(3.3V)

I can use FTDI chip TTL-232R-3V3, USB to TTL Serial Cable(3.3V) with FreeBSD(FreeBSD-10-current)

1. load uftdi driver(SEE man uftdi)
  add below line into /boot/loader.conf
 uftdi_load="YES"

2. use cu command
 cu -l /dev/ttyU0 -s 115200