Manual Document# 3PXCC4A3001 1
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Chapter 1: Introduction and General Information The B&B Electronics’ 3PXCC4A series serial interface cards are
designed for the IBM PC, XT, AT and compatibles. Ports are
configured as a standard DTE device, and connections are made on
RJ45 style connectors.
The 3PXCC4A cards offer exceptional setup flexibility. The
3PXCC4A series has the ability to use any I/O address and any
hardware interrupt. You can install as many serial ports as will
physically fit in a machine. To use one of the “non-standard”
addresses or interrupts, the serial software used must also offer that
flexibility. If you are writing your own application, be sure the
communications routines used support any address and IRQ. B&B
Electronics’ SimpCom Communications Drivers support these
features.
Features Each port independently configurable for any hex address 0 to hex
3F8 including COM1 – COM4
Each port independently configurable for any interrupt: 2, 3, 4, 5, 6,
7, 10, 11, 12, 14, and 15
Shared IRQ capability with Interrpt Status Register
Each port independently configurable for RS-232/RS-422 or RS-485
Jumper selectable interrupts: 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, and 15
Enhanced 16 bit Address Decoding
Baud rates up to 460.8K baud in RS-422/RS-485 Mode, 115.2K
baud in RS-232 Mode
16550A UARTs on all ports
RS-232 mode supports lines: TD, RD, RTS, CTS, DSR, DCD, and
DTR
RS-422/RS-485 mode supports lines: TD and RD
RTS control of RS-485 driver enable
Can be wired for half or full duplex RS-485 communications