rp2040_pac::ppb

Module mpu_ctrl

source
Expand description

Use the MPU Control Register to enable and disable the MPU, and to control whether the default memory map is enabled as a background region for privileged accesses, and whether the MPU is enabled for HardFaults and NMIs.

Structs§

  • MPU_CTRL_SPEC
    Use the MPU Control Register to enable and disable the MPU, and to control whether the default memory map is enabled as a background region for privileged accesses, and whether the MPU is enabled for HardFaults and NMIs.

Type Aliases§

  • ENABLE_R
    Field ENABLE reader - Enables the MPU. If the MPU is disabled, privileged and unprivileged accesses use the default memory map.
    0 = MPU disabled.
    1 = MPU enabled.
  • ENABLE_W
    Field ENABLE writer - Enables the MPU. If the MPU is disabled, privileged and unprivileged accesses use the default memory map.
    0 = MPU disabled.
    1 = MPU enabled.
  • HFNMIENA_R
    Field HFNMIENA reader - Controls the use of the MPU for HardFaults and NMIs. Setting this bit when ENABLE is clear results in UNPREDICTABLE behaviour.
    When the MPU is enabled:
    0 = MPU is disabled during HardFault and NMI handlers, regardless of the value of the ENABLE bit.
    1 = the MPU is enabled during HardFault and NMI handlers.
  • HFNMIENA_W
    Field HFNMIENA writer - Controls the use of the MPU for HardFaults and NMIs. Setting this bit when ENABLE is clear results in UNPREDICTABLE behaviour.
    When the MPU is enabled:
    0 = MPU is disabled during HardFault and NMI handlers, regardless of the value of the ENABLE bit.
    1 = the MPU is enabled during HardFault and NMI handlers.
  • PRIVDEFENA_R
    Field PRIVDEFENA reader - Controls whether the default memory map is enabled as a background region for privileged accesses. This bit is ignored when ENABLE is clear.
    0 = If the MPU is enabled, disables use of the default memory map. Any memory access to a location not
    covered by any enabled region causes a fault.
    1 = If the MPU is enabled, enables use of the default memory map as a background region for privileged software accesses.
    When enabled, the background region acts as if it is region number -1. Any region that is defined and enabled has priority over this default map.
  • PRIVDEFENA_W
    Field PRIVDEFENA writer - Controls whether the default memory map is enabled as a background region for privileged accesses. This bit is ignored when ENABLE is clear.
    0 = If the MPU is enabled, disables use of the default memory map. Any memory access to a location not
    covered by any enabled region causes a fault.
    1 = If the MPU is enabled, enables use of the default memory map as a background region for privileged software accesses.
    When enabled, the background region acts as if it is region number -1. Any region that is defined and enabled has priority over this default map.
  • R
    Register MPU_CTRL reader
  • W
    Register MPU_CTRL writer