Solvline PCIe - Manual (Page 24)

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Windows Device Driver Configuration
4. If you click the “Advanced Options” button, display the “Advanced Settings...”. The
below picture is “Advanced Settings...”. If UART type is 16C105x, Flow Control would
be activated and the FIFO size occupies “256”. You can select the “AutoRTS”,
“AutoCTS”, “AutoXonXoff” in “Flow Control”, and the “Interrupt Trigger Level”. At
“Interrupt Trigger Level”, RxFifo default is 32, TxFifo default is 64. If you click the
“Restore Defaults” button, “Advanced Settings...” restores default.
5. If 16C105x type multiport is connected devices which deal with small/low speed data
input and output, Interrupt could be delayed owing to big Trigger Level. In this case,
check the “55x Trigger Mode”, “55x Trigger Mode” is not suitable for large/high speed
data.