Renesas RX Series

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 Bi
t (
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:
0000000000000000
Bit Symbol Bit Name Function R/W
b0 S 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:
0000000000000000
Bit Symbol Bit Name Function R/W
b0 INV 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