NRF9160-SICA-R7 datasheet(87/400 Pages) NORDIC

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Peripherals

Peripheral A

PPIBus

ppiBusProducer [0:X-1]

ppiBusConsumer[0:X-1]

PeripheralCore

Peripheral B

PPIBus

PeripheralCore

DPPI

configuration

CHENSET / CHENCLR

ppiBusProducer [0:X-1]

ppiBusConsumer[0:X-1]

Figure 14: DPPI overview

6.2.1 Subscribing to and publishing on channels

The PPIBus can route peripheral events onto the channels (publishing), or route events from the channels

into peripheral tasks (subscribing).

All peripherals include the following:

• One subscribe register per task

• One publish register per event

Publish and subscribe registers use a channel index field to determine the channel to which the event is

published or tasks subscribed. In addition, there is an enable bit for the subscribe and publish registers

that needs to be enabled before the subscription or publishing takes effect.

Writing non-existing channel index (CHIDX) numbers into a peripheral's publish or subscribe registers will

yield unexpected results.

One event can trigger multiple tasks by subscribing different tasks to the same channel. Similarly, one

task can be triggered by multiple events by publishing different events to the same channel. For advanced

use cases, multiple events and multiple tasks can connect to the same channel forming a many-to-many

connection. If multiple events are published on the same channel at the same time, the events are merged

and only one event is routed through the DPPI.

How peripheral events are routed onto different channels based on publish registers is illustrated in the

following figure.

4418_1315 v2.0

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