Datasheet

238
SAM4S Series [DATASHEET]
11100F–ATARM–29-Jan-14
12.11.2.1 MPU Type Register
Name: MPU_TYPE
Access: Read/Write
Reset: 0x00000800
The MPU_TYPE register indicates whether the MPU is present, and if so, how many regions it supports.
• IREGION: Instruction Region
Indicates the number of supported MPU instruction regions.
Always contains 0x00. The MPU memory map is unified and is described by the DREGION field.
• DREGION: Data Region
Indicates the number of supported MPU data regions:
0x08 = Eight MPU regions.
• SEPARATE: Separate Instruction
Indicates support for unified or separate instruction and date memory maps:
0: Unified.
31 30 29 28 27 26 25 24
–
23 22 21 20 19 18 17 16
IREGION
15 14 13 12 11 10 9 8
DREGION
76543210
– SEPARATE