SWCU192 November 2021 CC1312R7 , CC1352P7 , CC2652P7 , CC2652R7
6.3.1 Introduction
The event fabric is a combinational router between event sources and event subscribers. The event inputs are routed to a central event-bus where a subscriber can select the appropriate events and output those as inputs to peripherals. Figure 6-3 shows the general concept of the event fabric. The event fabric is strictly combinational logic. Because this chapter provides only a general overview of the event fabric and the system CPU, NMI, and Freeze subscriber, refer to the specific peripheral chapters in this user's guide to understand how to use and configure the events for the different subscribers and peripherals.
Most of the events (signals) are statically routed, meaning that only a small number of configurable output lines go to the event subscribers. A configurable output line from a subscriber can choose from a list of several input events available to the specific subscriber in question. Subscribers output event signaling identical to input signaling. That is, events are simply passed through the event fabric as presented to the input ports. Possible event types include system hardware interrupts, software programmable interrupts, and DMA triggers. All event inputs are considered level-triggered events active high. Events like DMA triggers may or may not be level-type signals.
Figure 6-3 shows a simple illustration of the event fabric concept. Clearly the event fabric is not a peripheral in itself, but rather a block of routing between the peripherals and more. The lines that have configurable inputs are controlled by selection registers that are connected to a MUX, which forwards the selected input in the subscriber to the peripherals.
Figure 6-3 Event Fabric Concept