Port Flag Configuration tab
The Port Flag Configuration tab allows you to configure performance options and special
functionality on a per-port basis.
n Low Latency (930-based Edgeport only):
Normally the UART will interrupt when the receiver has been idle for 4 character times
(for example, 4ms at 9600). As long as data is being received, the UART will continue to
buffer them until its internal FIFO is full (~56 bytes). This flag causes the Edgeport to
poll the RX FIFO for received bytes. If any bytes are available, they will be sent to the
driver without any delay.
n Remap Baud: Setting the baud rate to 1200 baud results in 230400 baud.
n Ignore Flush:
If an application sends IRP_MJ_FLUSH_BUFFERS, it will be ignored. The following is an
excerpt from Microsoft documentation:
Drivers of devices with internal caches for data and drivers that maintain internal buffers
for data must handle this request.
Edgeport USB Expansion Modules Installation Guide
17
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