CH382 Is A Dual Serial Port And Printing Port Chip For The Pci-Express Bus,Including 2 Asynchronous Serial Ports Compatible With 16C550/16C750 And An Epp/Ecp Enhanced Bidirectional Parallel Port.The Asynchronous Serial Port Provides An 256- Buffer For Sending And Receiving, Supports A Communication Baud Rate Of 8mbps,Can Be Used For Pci-E,Rs232 Serial Port Expansion Of The Bus,Pci-E Serial Port With Auto Hardware Rate Control,Serial Port Networking,Rs485 Communication,Etc. The Same Chip Can Be Configured As Dual Serial Ports, Single Parallel Port/Printing Port, Or Dual Serial Ports Plus Parallel Port/Printing Port Of The Pci-E Bus. Provides A Two-Wire Serial Host Interface, Which Can Be Connected To A Serial Eeprom Device Similar To 24c0x For Storing Non-Volatile Data. The Device Identification ( Id, Device Id, Class Code, Etc.) Of The Pcie Board Can Be Set In The Eeprom Device. 3.3v Power Supply Voltage, Main I/O Pins Support 5v Withstand Voltage, And Support Serial Port Low-Power Sleep Mode. serial port 2 completely asynchronous serial ports, compatible with 16C550, 16C552, 16C554 and 16C750 and enhanced. Supports 5, 6, 7 or 8 data bits and 1 or 2 stop bits. Supports odd, even, no check, blank 0, flag 1 and other check modes. Programmable communication baud rate, supports 115200bps and communication baud rate up to 8Mbps. Built-in 256- first-in-first-out buffer, supporting 4 trigger levels. Supports MODEM modem signals , , RI, DCD, DTR, , and can be converted to RS232 level. Supports hardware flow control signals and automatic handshake and automatic transmission rate control, compatible with TL16C550C. Supports serial port frame error detection and Break line interval detection. Supports full-duplex andhalf-duplex serial communication. parallel port: Supports for SPP, , , PS/2, EPP, ECP and other IEEE1284 parallel port/printing port working modes. Supports two-way data transmission, supporting transmission speeds up to 1M bytes/second. : for Windows 98SE/ME/NT 4.0/2000/XP/Vista/Server2003/Win 7, Linux Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Material: PCB colour: As Shown Package Contents: 1 x PCI-E CH382L 1S1P Multi-Serial Card 1 x CD-Driver Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.