Datasheet

31.7.4 Channel Pending Interrupt
Name: INTPEND
Offset: 0x10
Reset: 0x4000
An interrupt that handles several channels should consult the INTPEND register to find out which channel
number has priority (ignoring/filtering each channel that has its own interrupt line). An interrupt dedicated
to only one channel must not use the INTPEND register.
Bit 15 14 13 12 11 10 9 8
BUSY READY EVD OVR
Access
R R RW RW
Reset 0 1 0 0
Bit 7 6 5 4 3 2 1 0
ID[4:0]
Access
RW RW RW RW RW
Reset 0 0 0 0 0
Bit 15 – BUSY Busy
This bit is read '1' when the event on a channel selected by Channel ID field (ID) has not been handled by
all the event users connected to this channel.
Bit 14 – READY Ready
This bit is read '1' when all event users connected to the channel selected by Channel ID field (ID) are
ready to handle incoming events on this channel.
Bit 9 – EVD Channel Event Detected
This flag is set on the next CLK_EVSYS_APB cycle when an event is being propagated through the
channel, and an interrupt request will be generated if CHINTENCLR/SET.EVD is '1'.
When the event channel path is asynchronous, the EVD bit will not be set.
Writing a '0' to this bit has no effect.
Writing a '1' to this bit will clear it. It will also clear the corresponding flag in the Channel n Interrupt Flag
Status and Clear register (CHINTFLAGn) of this peripheral, where n is determined by the Channel ID bit
field (ID) in this register.
Bit 8 – OVR Channel Overrun
This flag is set on the next CLK_EVSYS cycle after an overrun channel condition occurs, and an interrupt
request will be generated if CHINTENCLR/SET.OVRx is '1'.
There are two possible overrun channel conditions:
• One or more of the event users on channel selected by Channel ID field (ID) are not ready when a
new event occurs
• An event happens when the previous event on channel selected by Channel ID field (ID) has not yet
been handled by all event users
When the event channel path is asynchronous, the OVR interrupt flag will not be set.
Writing a '0' to this bit has no effect.
SAM D5x/E5x Family Data Sheet
EVSYS – Event System
© 2019 Microchip Technology Inc.
Datasheet
DS60001507E-page 867