Motorola MPC823e - Page 260

Memory Management Unit
11-42 MPC823e REFERENCE MANUAL MOTOROLA
MEMORY MANAGEMENT
11
UNIT
SA—Privileged (Supervisor) Access
For Bit 19:
0 = Subpage 0 (address[20:21]=00) privileged access is not permitted.
1 = Subpage 0 (address[20:21]=00) privileged access is permitted.
For Bit 20:
0 = Subpage 1 (address[20:21]=01) privileged access is not permitted.
1 = Subpage 1 (address[20:21]=01) privileged access is permitted.
For Bit 21:
0 = Subpage 2 (address[20:21]=10) privileged access is not permitted.
1 = Subpage 2 (address[20:21]=10) privileged access is permitted.
For Bit 22:
0 = Subpage 3 (address[20:21]=11) privileged access is not permitted.
1 = Subpage 3 (address[20:21]=11) privileged access is permitted.
SAT—Privileged (Supervisor) Access Type
0 = Privileged access type is read-only.
1 = Privileged access type is read/write.
URP0—Problem (User) Read Permission Page 0
0 = Subpage 0 (address[20:21]=00) problem read access is not permitted.
1 = Subpage 0 (address[20:21]=00) problem read access is permitted.
UWP0—Problem (User) Read Permission Page Zero
0 = Subpage 0 (address[20:21]=00) problem write access is not permitted.
1 = Subpage 0 (address[20:21]=00) problem write access is permitted.
URP1—Problem (User) Read Permission Page 1
0 = Subpage 1 (address[20:21]=01) problem read access is not permitted.
1 = Subpage 1 (address[20:21]=01) problem read access is permitted.
URP2—Problem (User) Read Permission Page Two
0 = Subpage 2 (address[20:21]=10) problem read access is not permitted.
1 = Subpage 2 (address[20:21]=10) problem read access is permitted.
UWP2—Problem (User) Write Permission Page Two
0 = Subpage 2 (address[20:21]=10) problem write access is not permitted.
1 = Subpage 2 (address[20:21]=10) problem write access is permitted.
URP3—Problem (User) Read Permission Page Three
0 = Subpage 3 (address[20:21]=11) problem read access is not permitted.
1 = Subpage 3 (address[20:21]=11) problem read access is permitted.