B&B Electronics 3PCI2 - Manual (Page 45)

40 Chapter 4 Documentation Number 3PCI2-0903 Manual
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk. – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
FIFO Settings
The default FIFO settings should minimize overhead and work well
for most users.
The FIFO Interrupt Trigger levels setting determines how often the
host processor services the serial port to send or receive data.
The Transmitter Trigger level sets how low the output buffer gets
before it triggers a request for more data from program memory.
The Receiver Trigger level sets how much data is in the input buffer
before it triggers a request to read the data from the buffer to
program memory.