Data Sheet

324
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181G–SAM-D21_Datasheet–09/2015
Table 19-9. Channel Arbitration Level
z Bit 4 – EVOE: Channel Event Output Enable
This bit indicates if the Channel event generation is enabled. The event will be generated for every condition
defined in the descriptor Event Output Selection (BTCTRL.EVOSEL).
0: Channel event generation is disabled.
1: Channel event generation is enabled.
This bit is available only on channels with event output support. Refer to Table 23-6 and Table 23-4 for details.
z Bit 3 – EVIE: Channel Event Input Enable
0: Channel event action will not be executed on any incoming event.
1: Channel event action will be executed on any incoming event.
This bit is available only on channels with event input support. Refer to Table 23-6 and Table 23-4 for details.
z Bits 2:0 – EVACT[2:0]: Event Input Action
These bits define the event input action, as shown in Table 19-10. The action is executed only if the corresponding
EVIE bit in CHCTRLB register of the channel is set. For details on event actions, refer to “Event Input Actions” on
page 286.
These bits are available only for channels with event input support. Refer to Table 23-6 and Table 23-4 for details.
Table 19-10. Event Input Action
LVL[1:0] Name Description
0x0 LVL0 Channel Priority Level 0
0x1 LVL1 Channel Priority Level 1
0x2 LVL2 Channel Priority Level 2
0x3 LVL3 Channel Priority Level 3
0x4-0x7 Reserved
EVACT[2:0] Name Description
0x0 NOACT No action
0x1 TRIG Transfer and periodic transfer trigger
0x2 CTRIG Conditional transfer trigger
0x3 CBLOCK Conditional block transfer
0x4 SUSPEND Channel suspend operation
0x5 RESUME Channel resume operation
0x6 SSKIP Skip next block suspend action
0x7 Reserved