The PCI Express RS232 Multi-Port I/O card is used EXAR’s high performance chipset 17V354, it is compliant to PCIe 2.0 Gen 1 (2.5GT/s), and it has Quad serial port  each port has many enhanced features such as the 256-bytes TX and RX FIFOs, 

Programmable Fractional Baud Rate Generator, Automatic Hardware or Software Flow control, it is complete to used for Point-of-Sale systems, Remote Access Servers, and factory Automation etc.

Features

● PCIe 2.0 Gen 1 compliant

● x1 Link, dual simplex, 2.5Gbps in each direction

● Expansion bus interface

● EEPROM interface for configuration

● Data read/write burst operation

● Global interrupt status register for all eight UARTs

● Up to 31.25 Mbps serial data rate

● 16 multi-purpose inputs/outputs (MPIOs)

● 16-bit general purpose timer/counter

● Sleep mode with wake-up Indicator

● Eight independent UART channels controlled with

   -- 16550 compatible register Set

   -- 256-byte TX and RX FIFOs

   -- Programmable TX and RX Trigger Levels

   -- TX/RX FIFO Level Counters

   -- Fractional baud rate generator

   -- Automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis

   -- Automatic Xon/Xoff software flow control

   -- RS-485 half duplex direction control output with programmable turn-around delay

   -- Multi-drop with Auto Address Detection

   -- Infrared (IrDA 1.1) data encoder/decoder

● Data bits: 5, 6, 7 or 8 

● Stop bits: 1, 1.5, 2

● Parity check: Even/ Odd/ Mark/ Space/ None

● Operating temperature range: -40 to +85℃