How to Multiplex Mini2440 Test Keys to GPIO Interface

The table below performs the Mini2440 test keys in order to be multiplexed to GPIO and other function interfaces. It has 6 test keys which are all CPU interrupt input signals and will be triggered a low level voltage. And here are those 6 keys:

You can Multiplex Mini2440 Test Keys through CON12 as defined above. Power supply 3.3V at CON12.7 and Ground (GND) at CON12.8.

(source: microarmsystems.com)