Atmel SAM4L-EK Atmel ATSAM4L-EK ATSAM4L-EK Data Sheet

42023E–SAM–07/2013

The main building blocks of the PEVC are:

• Channels: One channel per user, to propagate events and follow-up the user status

• Event Shapers (EVS): Instantiated for some generators, in case synchronisation and/or edge 

detection is needed prior to peripheral event propagation

• Input Glitch Filters (IGF): Present specifically for I/O inputs, to filter the incoming signal prior 

to going through EVS and Channel

To help distinguish the different signalling stages, following naming conventions are used:

• Generators generate events

• PEVC multiplexes these incoming events

• PEVC outputs triggers to users

Figure 31-2. PEVC Block Diagram

The maximum number of generators and Event Shapers supported by the PEVC is 64.

The maximum number of channels and users supported by the PEVC is 32.

EVS and IGF implementation are device-specific.

Refer to the Module Configuration section at the end of this chapter for the device-specific
configuration.

Channel 0

Channel ...

Channel i

User

0

Generator

...

Generator

0

EVS 0

PEVC

User

...

PAD_EVT  0

EVS …

Generator

...

Generator

j

User

i

TRIG 0

TRIG...

TRIG i

EVT...

EVT...

EVT  j

SEV

CHMX

RDY 0

RDY...

RDY i

CLK 0

CLK...

CLK i

IGF

EVS

IGF