R01UH0823EJ0100 Rev.1.00
Page 324 of 1823
Jul 31, 2019
RX23W Group
17. Memory-Protection Unit (MPU)
17.2.4
Background Access Control Register (MPBAC)
UBAC[2:0] Bits (Background Access Control Bits in User Mode)
These bits specify the background access control in user mode.
Address(es): 0008 6504h
b31
b30
b29
b28
b27
b26
b25
b24
b23
b22
b21
b20
b19
b18
b17
b16
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Value after reset:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
b15
b14
b13
b12
b11
b10
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
—
—
—
—
—
—
—
—
—
—
—
—
UBAC[2:0]
—
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
—
Reserved
The read value is 0. The write value should always be 0.
R/W
b3 to b1
Background Access Control Bits in
User Mode
b3
0: Reading prohibited
1: Reading permitted
b2
0: Writing prohibited
1: Writing permitted
b1
0: Execution prohibited
1: Execution permitted
R/W
b31 to b4
—
Reserved
The read value is 0. The write value should always be 0.
R/W