2.7.4.5.1 SIZE Field Values
The SIZE field defines the size of the MPU memory region specified by the MPU_RNR. as follows:
(Region size in bytes) = 2(SIZE+1)
The smallest permitted region size is 32B, corresponding to a SIZE value of 4. The following table provides example SIZE values, with the corresponding region size and value of N in the MPU_RBAR.
| SIZE value | Region size | Value of N 1 | Note |
|---|---|---|---|
| b00100 (4) | 32B | 5 | Minimum permitted size |
| b01001 (9) | 1KB | 10 | |
| b10011 (19) | 1MB | 20 | |
| b11101 (29) | 1GB | 30 | |
| b11111 (31) | 4GB | 32 | Maximum possible size |
Note:
- In the MPU_RBAR, see 2.7.4.4 MPU Region Base Address Register.