Moxa Technologies PCI Express Board User Manual page 27

PCI Express Board User's Manual
3. Click the port you would like to configure to highlight it, and then click Port Setting.
4. Select a COM number for the port from the Port Number pull-down list.
5. Select the Auto Enumerating COM Number option to map subsequent ports automatically.
The port numbers will be assigned in sequence. For example, if COM 3 is assigned to Port 1,
then COM 4 (if not already occupied) will be assigned to Port 2, etc.
6. Select an Rx FIFO Trigger from the Rx FIFO Level pull-down list. Rx FIFO trigger levels of
High, Middle, and Low are available, with the default set to High (120 bytes). Select Set the
change to all ports option to apply this Rx FIFO Trigger to all ports.
7. Select a Tx FIFO Level from the Tx FIFO Level pull-down list. Tx FIFO Levels of High,
Middle, and Low are available, with the default set to High (128 bytes). Select Set the
change to all ports option to apply the just defined Tx FIFO Size to all ports.
Tx FIFO Rx FIFO
High 128
Middle 64
Low 1
Unit: Bytes
3-12
Software Installation
120
60
1