R01UH0823EJ0100 Rev.1.00
Page 328 of 1823
Jul 31, 2019
RX23W Group
17. Memory-Protection Unit (MPU)
17.2.9
Region Search Operation Register (MPOPS)
S Bit (Region Search Operation Activation)
Setting this bit to 1 makes the memory-protection unit perform a region-search operation. The address specified in the
region search address register (MPSA) is compared with the address information for individual regions to search for a
hitting region.
The result of searching is stored in the data-hit region bits (HITD[7:0]) of the data-hit region register (MHITD).
Moreover, the logical OR of the respective access control bits for hitting regions is stored in the data-hit region access
control bits (UHACD[2:0]) in user mode.
17.2.10
Region Invalidation Operation Register (MPOPI)
INV Bit (Region Invalidate Start)
Setting this bit to 1 clears the valid (V) bits in all of the region-n end page number registers (REPAGEn) to 0. After a V
bit is cleared to 0, all settings other than background access-control settings are invalid.
Address(es): 0008 6524h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
S
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Function
R/W
b0
Region Search Operation
Activation
[Reading]
0: Fixed value for reading
[Writing]
0: Nothing is done.
1: A region-search operation proceeds.
R/W
b15 to b1
—
Reserved
The read value is 0. The write value should always be 0.
R/W
Address(es): 0008 6526h
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
INV
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Symbol
Bit Name
Function
R/W
b0
Region Invalidate Start
[Reading]
0: Fixed value for reading
[Writing]
0: Nothing is done.
1: All access-controlled areas are invalidated.
R/W
b15 to b1
—
Reserved
The read value is 0. The write value should always be 0.
R/W