The PCL-743 series card provides two RS-422/485 serial ports. Each port
utilizes a 16C550 UART with an on-chip 16-byte FIFO buffer for
reliable, high-speed serial I/O. The UART buffer divides data into
16-byte packets before sending them onto the bus. This drastically
reduces the CPU load and avoids data loss due to failure to respond to
the interrupt request in time. The UART is especially useful for high
speed serial I/O under Windows
Features:
Two independent
RS-422/485 serial ports
16C550 UARTs with on-chip 16-byte FIFO
Transmission speeds up to 921.6 kbps
I/O address and interrupt selectable
Wide IRQ selection: 3, 4, 5, 6, 7, 9,
10, 11, 12 or 15
Supports 2 wire or 4 wire operation
Supports Tx, Rx, RTS, and CTS signals
Automatic RS-485 data flow control or
RTS control
Termination resistors jumper
enable/disable
Space reserved for optional surge
protection on data lines
Supports standard DOS COM1, COM2,
COM3, and COM4
Supports Windows® 98/2000/XP,
Linux®
Powerful and easy-to-use utility
(ICOM Tools
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