NXP Semiconductors MWCT101 S Series, Reference Manual

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Field Function
M3SM Defines the access controls for bus master 3 in Supervisor mode.
00b - r/w/x; read, write and execute allowed
01b - r/x; read and execute allowed, but no write
10b - r/w; read and write allowed, but no execute
11b - Same as User mode defined in M3UM
20-18
M3UM
Bus Master 3 User Mode Access Control
Defines the access controls for bus master 3 in User mode. M3UM consists of three independent bits,
enabling read (r), write (w), and execute (x) permissions. In M3UM[2:0]: M3UM[2] controls read
permissions, M3UM[1] controls write permissions, and M3UM[0] controls execute permissions. For each
bit:
0b - An attempted access of that mode may be terminated with an access error (if not allowed by
another descriptor) and the access not performed
1b - Allows the given access type to occur
17
—
Reserved
This bit must be written with a zero.
16-15
M2SM
Bus Master 2 Supervisor Mode Access Control
Defines the access controls for bus master 2 in Supervisor mode.
00b - r/w/x; read, write and execute allowed
01b - r/x; read and execute allowed, but no write
10b - r/w; read and write allowed, but no execute
11b - Same as User mode defined in M2UM
14-12
M2UM
Bus Master 2 User Mode Access control
Defines the access controls for bus master 2 in User mode. M2UM consists of three independent bits,
enabling read (r), write (w), and execute (x) permissions. In M2UM[2:0]: M2UM[2] controls read
permissions, M2UM[1] controls write permissions, and M2UM[0] controls execute permissions. For each
bit:
0b - An attempted access of that mode may be terminated with an access error (if not allowed by
another descriptor) and the access not performed
1b - Allows the given access type to occur
11
M1PE
Bus Master 1 Process Identifier enable
0b - Do not include the process identifier in the evaluation
1b - Include the process identifier and mask (RGDn.RGDAAC) in the region hit evaluation
10-9
M1SM
Bus Master 1 Supervisor Mode Access Control
Defines the access controls for bus master 1 in Supervisor mode.
00b - r/w/x; read, write and execute allowed
01b - r/x; read and execute allowed, but no write
10b - r/w; read and write allowed, but no execute
11b - Same as User mode defined in M1UM
8-6
M1UM
Bus Master 1 User Mode Access Control
Defines the access controls for bus master 1 in User mode. M1UM consists of three independent bits,
enabling read (r), write (w), and execute (x) permissions. In M1UM[2:0]: M1UM[2] controls read
permissions, M1UM[1] controls write permissions, and M1UM[0] controls execute permissions. For each
bit:
0b - An attempted access of that mode may be terminated with an access error (if not allowed by
another descriptor) and the access not performed
1b - Allows the given access type to occur
5
M0PE
Bus Master 0 Process Identifier enable
0b - Do not include the process identifier in the evaluation
1b - Include the process identifier and mask (RGDn.RGDAAC) in the region hit evaluation
4-3 Bus Master 0 Supervisor Mode Access Control
Table continues on the next page...
Chapter 13 Memory Protection Unit (MPU)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors 217