11/9    In async serial communication, what's the purpose of using 1.5 or 2
        stop bits instead of just 1?  Doesn't that only waste time and slow
        down the line?  Thanks.  -- UART newbie
        \_ Bits are good.  More bits are better!
        \_ What's 1.5 bits?  How do you divide a bit?
                \_ run the clock twice as fast
           \_ probably alternates between 1 and 2 bits on each transmission.
              Just a guess. google it.
           \_ http://www.linuxdoc.org/HOWTO/Serial-HOWTO-19.html#ss19.2
              "In rare cases 1 1/2 stop bits are used. This means that the
              line is kept at -12 V for 1 1/2 time periods (like a stop bit 50%
              wider than normal)."
              wider than normal)."  But that doesn't say why someone would want
              to use more than 1 stop bits.