- Normally, the IOExpander generate an interrupt if it detects a change in key event. When the interrupt is not generated, if we want to know the actual # of keys being pressed, how can we find out?
- While holding down a key (Key A), if we very quickly release and press the same key again, will the IOExpander generate two interrupts or only one interrupt? If only one interrupt, then will the key events reported in order as happened (ie. key A release event and then key A press event)?