Routing Matrox Iris GTR auxiliary output signals 119
Using the Matrox Iris GTR breakout board’s output pullup
If you need an output pullup, you can use the output pullup resistor switches
(SW6) on the Matrox Iris GTR breakout board. To do so, turn on the output
pullup resistor switch for the auxiliary output signal used. Each of the output
pullup resistor switches (SW6[1-3]) is associated to one of the three auxiliary
output signals of your Matrox Iris GTR.
❖
Note that the amount of resistance provided by the Matrox Iris GTR
breakout board is 2.5 K
Ω ,
which is suitable for a 24 V power supply. If
another level of resistance is required, an external pullup resistor must be
used.
For the correspondence between the auxiliary output signals and the output pullup
resistor switches (SW6[1-3]), see the Output pullup resistor switches subsection of
the Switches reference section, later in this appendix. For example, to use an output
pull-up on the Matrox Iris GTR breakout board with auxiliary output signal 0
(AUX_OPTOIND_OUT0), turn on output pullup resistor switch 3 (SW6[3]).
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