SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
The AON IOC supports detection of positive and (or) negative edges on the digital I/Os and provides the resulting events to the AON event fabric as the following events:
The edge-detect event can be cleared by both the MCU GPIO and the AUX Domain. The edge detect event can also be cleared from MCU IOC by doing a disable or enable cycle of the edge configuration. The MCU GPIO has a separate clear line to each edge detection cell, while the AUX Domain uses a single line to clear all events on pins connected to the AUX Domain. When clearing from AUX Domain, all events related to AUX Domain I/Os are cleared.
The EDGE DETECT block uses an edge-detect cell for each I/O. Each detection cell can flag edge-detected and trigger an interrupt signal. The interrupt signals from all cells are ORed together to form a single interrupt line toward the AON event fabric.
The AON IOC can also generate an interrupt event when any programmable subset of the input I/Os generates an event. The registers controlling the edge-detect circuit reside in the MCU IOC.