Compliant with PCI Express specification Rev. 1.1 Single-lane PCI Express with throughput up to 2.5G bps Compatible with industrial standard 16C550/16C552/16C554 and16C750 UART Data transfer rate up to 115Kbps on each port On-chip 256-byte depth FIFO in transmit, receive path of each port Support 5-6-7-8-bit serial format, 1 or 2 Stop bit mode Support MODEM signal CTS, DSR, RI, DCD, DTR, RTS can be converted to RS232 level Odd, Even, No parity, space 0 and mark 1, etc.