Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

108 Chapter4
Using FDEVICECONTROL
Examples
Setting the Number of Stop Bits
Among the capabilities provided by FDEVICECONTROL is to specify
or set the number of stop bits used. By using FDEVICECONTROL with
a control directive of 71, it is possible to set the number of stop bits
used. There are two possible buffer values to specify the number of
stop bits used. See Figure 4-8 on how to set the number of stop bits
equal to two.
In asynchronous communication, the stop bit informs the receiving
device where the character ends. Thus it helps the receiving and
sending machines to synchronize the transmission.
Figure 4-8 Set the Number of Stop Bits