Memory Protection Unit
9-10 Copyright © 2005-2008 ARM Limited. All rights reserved. ARM DDI 0337G
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[16] B Bufferable bit:
1 = bufferable
0 = not bufferable.
[15:8] SRD Sub-Region Disable (SRD) field. Setting an SRD bit disables the corresponding sub-region.
Regions are split into eight equal-sized sub-regions. Sub-regions are not supported for region sizes
of 128 bytes and less. For more information, see Sub-Regions on page 9-12.
[7:6] - Reserved.
[5:1] SIZE MPU Protection Region Size Field. See Table 9-7.
[0] ENABLE Region enable bit.
Table 9-6 MPU Region Attribute and Size Register bit assignments (continued)
Bits Field Function
Table 9-7 MPU protection region size field
Region Size
b00000 Reserved
b00001 Reserved
b00010 Reserved
b00011 Reserved
b00100 32B
b00101 64B
b00110 128B
b00111 256B
b01000 512B
b01001 1KB
b01010 2KB
b01011 4KB
b01100 8KB
b01101 16KB
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