Datasheet

NMPU Registers

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11.4.12 MPU Region Access Control Register (MPUREGACR)

NOTE: MPUREGACR0-7 registers are memory-mapped to the same address. Which region register

is selected for read/write access is decided by the REGION field in the MPU region number

Figure 11-15. MPU Region Access Control Register (MPUREGACR) (offset = 38h)

31 16

Reserved

R-0

15 11 10 8 7 0

Reserved AP Reserved

R-0 R/WP-0 R-0

LEGEND: R/W = Read/Write; R = Read only; WP = Write in privileged mode only; -n = value after reset

Table 11-15. MPU Region Access Control Register (MPUREGACR) Field Descriptions

Bit Field Value Description

31-11 Reserved 0 Reserved. Reads return 0.

10-8 AP MPU Region Access Permission. This field determines the access permission for memory accesses to

addresses that are in an MPU region.

Read: Returns current value of AP.

Write in Privilege: Defines access permissions.

0 No access

1h Read/write in privileged mode; No access in user mode.

2h Read/write in privileged mode; Read only in user mode.

3h Read/write

4h No access

5h Read only in privileged mode; No access in user mode.

6h Read only

7h No access

7-0 Reserved 0 Reserved. Reads return 0.

462

System Memory Protection Unit (NMPU) SPNU562–May 2014

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