Impulse 3420 Uživatelský manuál stáhnout pdf (Strana 9)

Card Setup

Sealevel Systems COMM+8 Page 6

Set all jumpers to “S” if you are using more than one COMM+8 in a bus

or you wish to completely remove the pull-down resistor for hardware

compatibility. Setting the COMM+8 in this configuration when it is not

accompanied by a pull-down resistor will prevent the ports from

triggering an interrupt.

N S M N S M

E10

Figure 6 - Header E9 and E10, Sharing IRQs with another adapter

Clock Modes

The COMM+8 employs a unique clocking option that allows the user to

select from divide by 4 or divide by 1 clocking modes. This mode is

selected at E12.

To select the Baud rates commonly associated with COM: ports (i.e. 2400,

4800, 9600, 19.2, … 115.2K Bps) place the jumper in the divide by 4

mode (silk-screen DIV4).

DIV1

DIV4

Figure 7 - Clocking Mode ‘Divide By 4’

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Impulse 3420 Uživatelský manuál Strana 9