ATSAML22G17A MPU registers

The 5 registers of MPU (Memory Protection Unit), from 0xE000ED90, with their reset value and every field. The ATSAML22G17A has 1065 registers in 38 peripherals, one page each.

MPU Memory Protection Unit

TYPEMPU Type Register

Address: 0xE000ED90
Reset: 0x00000000
Access: read only
Size: 32-bit

3 fields

Field	Bits	What it does
IREGION	23:16	Number of Instruction Regions
DREGION	15:8	Number of Data Regions
SEPARATE	0	Separate instruction and Data Memory MapsRegions

CTRLMPU Control Register

Address: 0xE000ED94
Reset: 0x00000000
Access: read/write
Size: 32-bit

3 fields

Field	Bits	What it does
PRIVDEFENA	2	Enables privileged software access to default memory map
HFNMIENA	1	Enable Hard Fault and NMI handlers
ENABLE	0	MPU Enable

RNRMPU Region Number Register

Address: 0xE000ED98
Reset: 0x00000000
Access: read/write
Size: 32-bit

1 field

Field	Bits	What it does
REGION	7:0	Region referenced by RBAR and RASR

RBARMPU Region Base Address Register

Address: 0xE000ED9C
Reset: 0x00000000
Access: read/write
Size: 32-bit

3 fields

Field	Bits	What it does
VALID	4	Region number valid
REGION	3:0	Region number
ADDR	31:5	Region base address

RASRMPU Region Attribute and Size Register

Address: 0xE000EDA0
Reset: 0x00000000
Access: read/write
Size: 32-bit

9 fields

Field	Bits	What it does
XN	28	Execute Never Attribute
AP	26:24	Access Permission
TEX	21:19	TEX bit
S	18	Shareable bit
C	17	Cacheable bit
B	16	Bufferable bit
SRD	15:8	Sub-region disable
SIZE	5:1	Region Size
ENABLE	0	Region Enable