13.11 External Interrupt Requests

The interrupt controller supports up to five external interrupt request signals, INT0 - INT4. These inputs are edge-sensitive, they require a low to high, or a high to low transition to create an interrupt request. The INTCON2 register has five bits, INT0EP - INT4EP, that select the polarity of the edge detection circuitry. Each external interrupt pin can be programmed to interrupt the CPU on a rising edge or falling edge event. INT0-INT2 can also be used as channel trigger sources for DMA or synchronization sources for CCP.