NRF51822-CDAC-R datasheet(27/130 Pages) NORDIC

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Page 27

nRF51822 Product Specification v3.3

3.5

Programmable Peripheral Interconnect (PPI)

The Programmable Peripheral Interconnect (PPI) enables peripherals to interact autonomously with each

other using tasks and events independent of the CPU. The PPI allows precise synchronization between

peripherals when real-time application constraints exist and eliminates the need for CPU activity to

implement behavior which can be predefined using PPI.

Table 9 PPI properties

The PPI system has in addition to the fully programmable peripheral interconnections, a set of channels

where the event (EEP) and task (TEP) endpoints are set in hardware. These fixed channels can be individually

enabled, disabled, or added to PPI channel groups in the same way as ordinary PPI channels. See the nRF51

Series Reference Manual for more information.

Table 10 Pre-programmed PPI channels

Instance

Channel

Number of channels

Number of groups

PPI

0 - 15

Instance

Channel

Number of channels

Number of groups

PPI

20 - 31

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