Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK Data Sheet

302

SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]

11063K–ATARM–05-Nov-13

MATRIX_PRAS0...MATRIX_PRAS4

0xFFFFDE80 [0], 0xFFFFDE88 [1], 0xFFFFDE90 [2], 0xFFFFDE98 [3], 0xFFFFDEA0 [4]

Read-write 

Fixed priority of Master x for accessing the selected slave. The higher the number, the higher the priority.

All the masters programmed with the same MxPR value for the slave make up a priority pool.

Round-Robin arbitration is used inside the lowest (MxPR = 0) and highest (MxPR = 3) priority pools.

Fixed priority is used inside intermediate priority pools (MxPR = 1) and (MxPR = 2).

 for details.

31

30

29

28

27

26

25

24

–

–

–

–

–

–

–

–

23

22

21

20

19

18

17

16

–

–

M5PR

–

–

M4PR

15

14

13

12

11

10

9

8

–

–

M3PR

–

–

M2PR

7

6

5

4

3

2

1

0

–

–

M1PR

–

–

M0PR