Cypress S6J3200 Series, Руководство пользователя

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CHAPTER 31:Memory Protection Unit for AXI
S6J3200 Series Hardware Manual Document Number: 002-04852 Rev. *G 1147
4.1.
MPU AXI Control Register (MPUXn_CTRL0)
MPU AXI Control Register can be used by the software to configure the MPU AXI. This register provides
a bit to enable the MPU AXI 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 MPU AXI lock status and controls the status for Non-Maskable
Interrupt.
 MPUXn_CTRL0
MPUXn_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
W
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
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 background region. For
detailed description of these bits refer to Table "Access Permissions".
[23:18] read0
-
[17] MPUENC
MPU AXI Enable Control
"0": MPU AXI monitoring and protection function is disabled "1": MPU AXI
monitoring and protection function is enabled
Read returns status of MPUENC bit.
The region enable status to be effective takes some delay with reference to
write on MPUENC bit. The actual enable status can be read through
MPUXn_CTRL0:MPUEN bit.
[16] MPUEN
MPU AXI Enable Status
"0": MPU AXI monitoring and protection function is disabled. All accesses on
AXI master write or read address channel inter- faces are passed on to AXI
memory write or read address chan- nel interfaces without any protection
"1": MPU AXI monitoring and protection function is enabled
[15:13] read0
-