1.Fully compliant with PCI-Express Base Specification Revision1.1 2.Single-lan PCI-Express with throughput up to 2.5Gbps 3.Compatible with industrial standard 16C550\16C552\16C554 and 16C750 UART 4.On chip 256-byte depth FIFO in transmit, receive path of each port 5.Support for bi-directional data transmission, the transmission speed up to 2M bytes support 6.Built-in SPP,PS/2,EPP,ECP compatibles with IEEE1284 Printing Protocol 7.Supports 5-6-7-8-bit serial format, support 1 or 2 Stop bit operation