B & B ELECTRONICS

422ICCA, 422ICCB

Card Type   Serial
Chipset     16550A (422ICCA)

            16750 (422ICCB)
I/O Options Serial port
Data Bus    8-bit ISA

[Image]

                          CONNECTIONS

            Function                         Label

  RS-422 or RS-485 serial port                J1

                        USER CONFIGURABLE SETTINGS

                   Setting                      Label        Position

      Serial port is RS-485                     JP1/A        Pins 1 & 2
                                                              closed

      Serial port is RS-422                     JP1/A        Pins 2 & 3
                                                              closed

  »   Handshaking signals normal                JP1/B        Pins 1 & 2
                                                              closed

      Handshaking signals forced high           JP1/B        Pins 2 & 3
                                                              closed

                       SERIAL PORT ADDRESS SELECTION

    Setting         JP2/A          JP2/B          JP2/C         JP2/D

  3F8h (COM1:)      Closed         Open           Open           Open

  2F8h (COM2:)       Open         Closed          Open           Open

  3E8h (COM3:)       Open          Open          Closed          Open

  2E8h (COM4:)       Open          Open           Open          Closed

                            INTERRUPT SELECTION

  Setting    JP3/A      JP3/B      JP3/C     JP3/D      JP3/E     JP3/F

   IRQ2       Open       Open      Open       Open      Open      Closed

   IRQ3       Open       Open      Open       Open     Closed      Open

   IRQ4       Open       Open      Open      Closed     Open       Open

   IRQ5       Open       Open     Closed      Open      Open       Open

   IRQ6       Open      Closed     Open       Open      Open       Open

   IRQ7      Closed      Open      Open       Open      Open       Open