SAM3SD8B Atmel Corporation, SAM3SD8B Datasheet - Page 201

• Manufacturer Part Number: SAM3SD8B
• Manufacturer: Atmel Corporation

10.22.3
• REGION
Indicates the MPU region referenced by the RBAR and RASR registers.
The MPU supports 8 memory regions, so the permitted values of this field are 0-7.
Normally, you write the required region number to this register before accessing the RBAR or RASR. However you can
change the region number by writing to the RBAR with the VALID bit set to 1, see
page
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
202. This write updates the value of the REGION field.
31
23
15
7
MPU Region Number Register
30
22
14
6
The RNR selects which memory region is referenced by the RBAR and RASR registers. See the
register summary in
29
21
13
5
Table 10-35 on page 197
28
20
12
4
Reserved
Reserved
Reserved
REGION
27
19
11
3
for its attributes. The bit assignments are:
“MPU Region Base Address Register” on
26
18
10
2
SAM3S8/SD8
SAM3S8/SD8
25
17
9
1
24
16
8
0
201
201