page 7
!
Connecting Digital I/O
Your Videum board provides 32 digital I/O which can be used as trigger input or as
event signaling output. Each input and output is used individually as input or output. The
Digital I/O interface on the board is controlled through Winnov’s ActiveX software and
the Videum SDK (Software Development Kit).
When an I/O is configured as an input, the output FET’s are
off, creating high impedance input with a weak pull-up to
+5V. If the I/O is configured as an output, then the output
FETs are active depending on the state of the Output Port
register.
Note: Care should be exercised if an external voltage is
applied to an I/O configured as an output because of the
low impedance path that exists between the pin and either
+5V or GND.