NXP Semiconductors MWCT101 S Series, Reference Manual

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Field Function
3
—
Reserved
2
SP7
Supervisor Protect
Determines whether the peripheral requires supervisor privilege level for accesses. When this field is set,
the master privilege level must indicate the supervisor access attribute, and the MPR
x [MPL n ] control field
for the master must be set. If not, access terminates with an error response and no peripheral access
initiates.
0b - This peripheral does not require supervisor privilege level for accesses.
1b - This peripheral requires supervisor privilege level for accesses.
1
WP7
Write Protect
Determines whether the peripheral allows accesses from an untrusted master. When this field is set and
an access is attempted by an untrusted master, the access terminates with an error response and no
peripheral access initiates.
0b - This peripheral allows write accesses.
1b - This peripheral is write protected.
0
TP7
Trusted Protect
Determines whether the peripheral allows accesses from an untrusted master. When this field is set and
an access is attempted by an untrusted master, the access terminates with an error response and no
peripheral access initiates.
0b - Accesses from an untrusted master are allowed.
1b - Accesses from an untrusted master are not allowed.
14.4 Functional description
The peripheral bridge functions as a bus protocol translator between the crossbar switch
and the slave peripheral bus.
The peripheral bridge manages all transactions destined for the attached slave devices and
generates select signals for modules on the peripheral bus by decoding accesses within
the attached address space.
14.4.1 Access support
Aligned and misaligned 32-bit, 16-bit, and byte accesses are supported for 32-bit
peripherals. Misaligned accesses are supported to allow memory to be placed on the slave
peripheral bus. Peripheral registers must not be misaligned, although no explicit checking
is performed by the peripheral bridge. All accesses are performed with a single transfer.
All accesses to the peripheral slots must be sized less than or equal to the designated
peripheral slot size. If an access is attempted that is larger than the targeted port, an error
response is generated.
Chapter 14 Peripheral Bridge (AIPS-Lite)
MWCT101xS Series Reference Manual, Rev. 3, 07/2019
NXP Semiconductors 283