+
+\S2{using-cmdline-sercfg} \i\c{-sercfg}: specify serial port
+\i{configuration}
+
+This option specifies the configuration parameters for the serial
+port (baud rate, stop bits etc). Its argument is interpreted as a
+comma-separated list of configuration options, which can be as
+follows:
+
+\b Any single digit from 5 to 9 sets the number of data bits.
+
+\b \cq{1}, \cq{1.5} or \cq{2} sets the number of stop bits.
+
+\b Any other numeric string is interpreted as a baud rate.
+
+\b A single lower-case letter specifies the parity: \cq{n} for none,
+\cq{o} for odd, \cq{e} for even, \cq{m} for mark and \cq{s} for space.
+
+\b A single upper-case letter specifies the flow control: \cq{N} for
+none, \cq{X} for XON/XOFF, \cq{R} for RTS/CTS and \cq{D} for
+DSR/DTR.
+
+For example, \cq{-sercfg 19200,8,n,1,N} denotes a baud rate of
+19200, 8 data bits, no parity, 1 stop bit and no flow control.