QUATECH, INC.

SCL-6100

Card Type          Serial controller
Chipset/Controller Unidentified UART
I/O Options        Serial I/O port
Maximum DRAM       N/A

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                   CONNECTIONS

         Purpose                 Location

  DB-25 serial I/O port            CN1

                              CLOCK FREQUENCY

                Frequency                               J3

  »               1.8432MHz               Pins 1 & 2, 3 & 6, 4 & 5 closed

                  3.6864MHz                  Pins 2 & 3, 4 & 5 closed

                  9.216MHz                   Pins 1 & 2, 5 & 6 closed

                  18.432MHz                      Pins 2 & 5 closed

                             OUTPUT CONFIGURATION

    Setting      SW2/1   SW2/2   SW2/3   SW2/4   SW2/5   SW2/6   SW2/7   SW2/8

  »    Active     Off     Off     On      On      On     Off     Off     Off
      transmit
        20mA

       Passive    On      On      Off     Off    Off     Off     Off     Off
      transmit

       Active     Off     Off     On      On      On      On     Off     Off
      transmit
        30mA

       Active     Off     Off     On      On      On      On      On     Off
      transmit
        60mA

       RS-232     Off     Off     Off     Off    Off     Off     Off      On
      transmit

                             INPUT CONFIGURATION

    Setting     SW1/1   SW1/2   SW1/3   SW1/4   SW1/5   SW1/6   SW1/7   SW1/8

  »   Passive    On      On      Off     Off    Off     Off     Off     Off
      receive

       Active    Off     Off     On      On      On     Off     Off     Off
      receive
       20mA

       Active    Off     Off     On      On      On      On     Off     Off
      receive
       30mA

       Active    Off     Off     On      On      On      On      On     Off
      receive
       60mA

       RS-232    Off     Off     Off     Off    Off     Off     Off      On
      receive

                         CURRENT THRESHOLD SELECT

            Setting                                 J2

  »             20mA                     Pins 1 & 5, 4 & 8 closed

                30mA                     Pins 2 & 6, 4 & 8 closed

                60mA                     Pins 3 & 4, 4 & 8 closed

           RS-232 receive                Pins 2 & 3, 6 & 7 closed

  DTE/DCE CONFIGURATION

            J1

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