ADLINK C485 - Manual (Page 20)

14
• Introduction
1.6 Overview of C485
1.6.1 What is C485?
The C485 is an enhanced four ports serial communication card used for PC
with PCI bus. It includes a PGA to support the serial communication
controller and a 37-pin connector to connect external I/O port.
The expansion cable has four standard DB25 connectors and one DB37
connector to connect to C485 interface card.
1.6.2 Feature of C485
•
PCI Rev.2.1 Plug and Play
•
IRQ and IO address automatically assigned by PCI plug-n-play
•
4 communication ports intelligent buffer
•
Suitable for modems, data display, data collection,
telecommunication
•
Supports up to 2 cards/8 ports per system
•
Supports Windows 95/98, NT operation system
•
Isolated RS-422/485 interface for each port independently
1.6.3 Specification of C485
♦
Compliant with PCI Spec.2.1
♦
Serial communication controller:
•
16C550A compatible
•
1.8432 ~ 7.3728 MHz
♦
System IO mapping:
•
Assigned by PCI BIOS
•
Shared IRQ
♦
Flow control
•
Xon/Xoff control