Beginner: How to wire up a navigation button / joystick?
The device is likely a just a set of passive switches. There is no &quot;VCC&quot;.

&quot;COM&quot; would be the &quot;common&quot; pin. You can supply it with a voltage (5V
for example) and then each signal (UP/DOWN/etc) would go to something
like inputs on your microcontroller.
You could also use it the
other way around by connecting COM to ground, and the signal pins
could have their own pull-ups.