Using MAX to configure digital input levels on a USB-6009

[GeoffHammond]

Hello,

I'm using a USB-6009 in a Windows environment. MAX lets me configure the 8 bits in port 0 as either input or output. However, when I set the bits to be all inputs, their default level is high, and the "ALL LOW" button is grayed out. Is there a way I can activate this button to set all input bits low and so be set to read a +5V input pulse?

Regards

Geoff Hammond

[Dennis_Knutson · Accepted solution]

When you configure the pins as inputs, you can read either 0 or 5 volts. It does not make any sense to set then high or low. Any pin that is disconnected will of course sense a logic 1 because of the pull-ups on the device.

[GeoffHammond]

Of course; thank you.

Geoff