In my project I am using fans to control the temperature of the system and the chip I am using has a FAN_FAILURE mode that goes from low to high when the fans fail. I was wondering if I can connect this to a pin on Port 1 on the G120 for example pin 1.25-LCDG5. I have read the manual for the arm 3 processor and it says for GPIO interrupt ports are only 0 and 2. On page 137 it says “Port 0 and Port 2 can provide a single interrupt for any combination of port pins.”. So my question is if I do connect the external interrupt onto pin 1.25 will an interrupt be registered if the FAN is to fail.
G120 schematic - http://www.ghielectronics.com/downloads/schematic/FEZ_Cobra_II_SCH.pdf \
LPC178x/7x processor page 137