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4.4 FIFO Settings
Select an Rx FIFO Trigger and Tx FIFO Size.
The default Rx FIFO Trigger is 112 bytes. The default Tx FIFO Size is 128
bytes. Click
“
Set to All
” to change this setting for all serial ports on the board.
Then click
“
OK
” to save the settings.
Receive FIFO interrupt trigger level:
When the level of data in the receiver FIFO reaches this value, a receiver data
interrupt is triggered.
Transmit FIFO interrupt trigger level:
When the level of data in the transmit FIFO falls below this value, a transmitter
interrupt is triggered. Setting this value to zero will not trigger an interrupt until
the transmitter is completely idle.
The FIFO trigger levels can be fine tuned to gain optimum performance,
depending on system performance, baud rate used, levels of serial traffic etc.
