User`s manual

3-24 Smartio C168H/PCI User’s Manual
3. Select a COM number for the port from the Port Number pull-down list.
Note! Skip step 4 if you wish to manually assign COM numbers to your
ports.
4. Click on the Auto Enumerating COM Number checkbox to have subsequent
ports mapped to consecutive COM numbers. For example, if COM 3 is assigned
to Port 1, then COM 4 will be automatically assigned to Port 2.
Note! Skip steps 5 to 8 if your system does not require special
performance tuning.
5. Select an Rx FIFO Trigger from the Rx FIFO Trigger pull-down list.
Rx FIFO trigger levels are available at 1, 4, 8, and 14 bytes, with the default value
set at 14 bytes.
6. Check Set the change to all ports checkbox if you would like to apply this Rx
FIFO Trigger to all of your ports.