I2C data interrupt lines

Question

I am trying to figure out how interrupts are set up for say a sensor with an interrupt line which signals when new data is ready. 
 I am assuming you set up a GPIOTE somehow to trigger an interrupt routine which you can then use to setup the I2C connection, connect to the device, and get the data, after that you could go to sleep again. Is there a simple example for this? 
 Much Thanks!

Ole Morten · Accepted Answer

Your basic scheme sounds reasonable: Use GPIOTE PORT event if you need to care about current consumption, check that the i/O is the correct one and then start the TWI transaction from the GPIOTE interrupt handler. 
 Håkon has made a quick GPIOTE PORT example that's available here , so that should be a useful starting point.