Atmel ATSAML22G16A-AUT, Manual

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Value Description
0 Static arbitration scheme for channels with level 2 priority.
1 Round-robin arbitration scheme for channels with level 2 priority.
Bits 19:16 – LVLPRI2[3:0]: Level 2 Channel Priority Number
When round-robin arbitration is enabled (PRICTRL0.RRLVLEN2=1) for priority level 2, this register holds
the channel number of the last DMA channel being granted access as the active channel with priority
level 2.
When static arbitration is enabled (PRICTRL0.RRLVLEN2=0) for priority level 2, and the value of this bit
group is non-zero, it will not affect the static priority scheme.
This bit group is not reset when round-robin arbitration gets disabled (PRICTRL0.RRLVLEN2 written to
'0').
Bit 15 – RRLVLEN1: Level 1 Round-Robin Scheduling Enable
For details on arbitration schemes, refer to Arbitration .
Value Description
0 Static arbitration scheme for channels with level 1 priority.
1 Round-robin arbitration scheme for channels with level 1 priority.
Bits 11:8 – LVLPRI1[3:0]: Level 1 Channel Priority Number
When round-robin arbitration is enabled (PRICTRL0.RRLVLEN1=1) for priority level 1, this register holds
the channel number of the last DMA channel being granted access as the active channel with priority
level 1.
When static arbitration is enabled (PRICTRL0.RRLVLEN1=0) for priority level 1, and the value of this bit
group is non-zero, it will not affect the static priority scheme.
This bit group is not reset when round-robin arbitration gets disabled (PRICTRL0.RRLVLEN1 written to
'0').
Bit 7 – RRLVLEN0: Level 0 Round-Robin Scheduling Enable
For details on arbitration schemes, refer to Arbitration .
Value Description
0 Static arbitration scheme for channels with level 0 priority.
1 Round-robin arbitration scheme for channels with level 0 priority.
Bits 3:0 – LVLPRI0[3:0]: Level 0 Channel Priority Number
When round-robin arbitration is enabled (PRICTRL0.RRLVLEN0=1) for priority level 0, this register holds
the channel number of the last DMA channel being granted access as the active channel with priority
level 0.
When static arbitration is enabled (PRICTRL0.RRLVLEN0=0) for priority level 0, and the value of this bit
group is non-zero, it will not affect the static priority scheme.
This bit group is not reset when round-robin arbitration gets disabled (PRICTRL0.RRLVLEN0 written to
'0').
Atmel SAM L22G / L22J / L22N [DATASHEET]
Atmel-42402E-SAM L22G / L22J / L22N_Datasheet_Complete-07/2016
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