Cypress S6J3200 Series, Руководство пользователя

Страница: 1172 / 1355

CHAPTER 32:Memory Protection Unit for AHB
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G 1171
4.1.
MPU AHB Control Register (MPUHn_CTRL0)
MPU AHB Control Register can be used by the software to configure the MPU AHB. This register
provides enable bit to enable the MPU AHB monitoring and protection function. It also provides
permission attributes for background region. It also provides controls for enabling or disabling of
privileged mode overwrite feature and MPU STOP feature. Lastly it provides status of MPU AHB lock bit
and Non-Maskable Interrupt flag.
MPUHn_CTRL0
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
read0 read0 read0 read0 read0
A
P
[2
]
A
P
[1
]
A
P
[0
]
read0 read0 read0 read0 read0 read0
MP
U
E
N
C
MP
U
E
N
read0 read0 read0
P
R
OT
P
OEN
MP
U
S
T
O
P
E
N
MP
U
S
T
O
P
LS
T
read0 read0 read0 read0 read0 read0
N
MI
C
L
N
MI
R0 R0 R0 R0 R0
R
W
P
R
W
P
R
W
P
R0 R0 R0 R0 R0 R0
R
0W
P
R
R0 R0 R0
R
W
P
R
W
P
R
W
P
R R
R0 R0 R0 R0 R0 R0
R
0W
P
1
R
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
Bit Position Bit Field Name Bit Description
[31:27] read0
-
[26:24] AP
Access Permissions for Background Region
These bits are used to control access permissions for a background region.
For more details about these bits, refer to Table 7.3-1.
Note: AP[2:0] bits for background region can only be written when the MPU is
disabled (MPUHn_CTRL0:MPUEN = "0").
[23:18] read0
-
[17] MPUENC
MPU AHB Enable Control
"0": MPU AHB Monitoring and Protection Function is disabled
"1": MPU AHB Monitoring and Protection Function is enabled
Read returns "0".
[16] MPUEN
MPU AHB Enable Status
"0": MPU AHB Monitoring and Protection Function is disabled. All accesses
from the AHB Master Interface are passed on to the AHB memory interface
without any protection
"1": MPU AHB Monitoring and Protection Function is enabled
[15:13] read0
-