Texas Instruments TM4C1294NCPDT User Manual

Register 20: Base Priority Mask Register (BASEPRI)
The BASEPRI register defines the minimum priority for exception processing. When BASEPRI is
set to a nonzero value, it prevents the activation of all exceptions with the same or lower priority
level as the BASEPRI value. Exceptions should be disabled when they might impact the timing of
critical tasks. This register is only accessible in privileged mode. For more information on exception
priority levels, see “Exception Types” on page 114.
Base Priority Mask Register (BASEPRI)
Type RW, reset 0x0000.0000
16171819202122232425262728293031
reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
0123456789101112131415
reservedBASEPRIreserved
RORORORORORWRWRWROROROROROROROROType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x0000.00ROreserved31:8
Base Priority
Any exception that has a programmable priority level with the same or
lower priority as the value of this field is masked. The PRIMASK register
can be used to mask all exceptions with programmable priority levels.
Higher priority exceptions have lower priority levels.
DescriptionValue
All exceptions are unmasked.0x0
All exceptions with priority level 1-7 are masked.0x1
All exceptions with priority level 2-7 are masked.0x2
All exceptions with priority level 3-7 are masked.0x3
All exceptions with priority level 4-7 are masked.0x4
All exceptions with priority level 5-7 are masked.0x5
All exceptions with priority level 6-7 are masked.0x6
All exceptions with priority level 7 are masked.0x7
0x0RWBASEPRI7:5
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x0ROreserved4:0
June 18, 201498
Texas Instruments-Production Data
The Cortex-M4F Processor

Texas Instruments TM4C1294NCPDT Specifications

General

Brand	Texas Instruments
Model	TM4C1294NCPDT
Category	Microcontrollers
Language	English