21.4.4 Interrupt Generation

For interrupt handling, the PIO Controllers are considered as user peripherals. This means that the PIO Controller interrupt lines are connected among the interrupt sources. The PIO Controller supplies one interrupt signal per I/O group. Refer to the PIO Controller peripheral identifier in the product description to identify the interrupt sources dedicated to the PIO Controller. The PIO Controller provides two groups of interrupt lines to ease management of interrupt priorities related to Privileged-Access and User-Access mode I/O lines. Using the PIO Controller requires the Interrupt Controller to be programmed first.

The PIO Controller interrupt can be generated only if the PIO Controller clock is enabled.