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NMPU Registers

11.4.13 MPU Region Number Register (MPUREGNUM)

NOTE: MPUREGBASE0-7, MPUREGSENA0-7, MPUREGACR0-7, MPUREGAM0-7, MPUREGTA0-

7, and MPUREGMT0-7 registers are memory-mapped to just six different addresses. Which

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

region number register (MPUREGNUM).

Figure 11-16. MPU Region Number Register (MPUREGNUM) (offset = 3Ch)

31 16

Reserved

R-0

15 4 3 0

Reserved REGION

R-0 R/WP-0

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

Table 11-16. MPU Region Number Register (MPUREGNUM) Field Descriptions

Bit Field Value Description

31-4 Reserved 0 Reserved. Reads return 0.

3-0 REGION MPU Region Number. This field determines which MPU region registers are accessed. Writing this

MPUTYPE register) does not affect the NMPU functionality. Behavior will be same as that of reserved

space.

Read: Returns current value of REGION.

Write in Privilege:

0 Access MPU region 0 registers

1h Access MPU region 1 registers

2h Access MPU region 2 registers

3h Access MPU region 3 registers

4h Access MPU region 4 registers

5h Access MPU region 5 registers

6h Access MPU region 6 registers

7h Access MPU region 7 registers

463

SPNU562–May 2014 System Memory Protection Unit (NMPU)

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