Memory Protection Unit (MPU)
The ui32Flags parameter is the logical OR of all of the attributes of the region. It is a com-
bination of choices for region size, execute permission, read/write permissions, disabled sub-
regions, and a flag to determine if the region is enabled.
The size flag determines the size of a region, and must be one of the following:
MPU_RGN_SIZE_32B
MPU_RGN_SIZE_64B
MPU_RGN_SIZE_128B
MPU_RGN_SIZE_256B
MPU_RGN_SIZE_512B
MPU_RGN_SIZE_1K
MPU_RGN_SIZE_2K
MPU_RGN_SIZE_4K
MPU_RGN_SIZE_8K
MPU_RGN_SIZE_16K
MPU_RGN_SIZE_32K
MPU_RGN_SIZE_64K
MPU_RGN_SIZE_128K
MPU_RGN_SIZE_256K
MPU_RGN_SIZE_512K
MPU_RGN_SIZE_1M
MPU_RGN_SIZE_2M
MPU_RGN_SIZE_4M
MPU_RGN_SIZE_8M
MPU_RGN_SIZE_16M
MPU_RGN_SIZE_32M
MPU_RGN_SIZE_64M
MPU_RGN_SIZE_128M
MPU_RGN_SIZE_256M
MPU_RGN_SIZE_512M
MPU_RGN_SIZE_1G
MPU_RGN_SIZE_2G
MPU_RGN_SIZE_4G
The execute permission flag must be one of the following:
MPU_RGN_PERM_EXEC enables the region for execution of code
MPU_RGN_PERM_NOEXEC disables the region for execution of code
The read/write access permissions are applied separately for the privileged and user modes.
The read/write access flags must be one of the following:
MPU_RGN_PERM_PRV_NO_USR_NO - no access in privileged or user mode
MPU_RGN_PERM_PRV_RW_USR_NO - privileged read/write, user no access
MPU_RGN_PERM_PRV_RW_USR_RO - privileged read/write, user read-only
MPU_RGN_PERM_PRV_RW_USR_RW - privileged read/write, user read/write
MPU_RGN_PERM_PRV_RO_USR_NO - privileged read-only, user no access
MPU_RGN_PERM_PRV_RO_USR_RO - privileged read-only, user read-only
150 April 8, 2013
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