QUATECH, INC.

MPA-2000/3000

Category               Serial Controller
Chipset Controller     Intel Corporation
I /O Options Supported Serial port
Maximum Onboard Memory N/A

[Image]

                                CONNECTIONS

       Purpose           Location           Purpose           Location

  DCE connector -           CN1        DTE connector -           CN2
  female DB-25                         male DB-25

  Note: Either CN1 or CN2 is installed, but not both.

                              DRIVER CONTROL

                 Setting                                 J2

         Drivers always enabled                  pins 1 & 2 closed

    Drivers enabled by communications            pins 2 & 3 closed
             register bit D0

                             RECEIVER CONTROL

                 Setting                                 J2

        Receivers always enabled                 pins 4 & 5 closed

   Receivers enabled by communications           pins 5 & 6 closed
             register bit D1

                        DMA REQUEST CHANNEL

             Setting                             J3

  DTR/REQA for transmitting data          pins 1 & 2 closed

   RDY/REQB for receiving data            pins 2 & 3 closed

        MISCELLANEOUS TECHNICAL NOTES

  J1 is factory configured - do not alter.