Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X Datenbogen
Produktcode
DK-TM4C129X
Description
Reset
Type
Name
Bit/Field
Divide-by-Zero Usage Fault
Description
Value
No divide-by-zero fault has occurred, or divide-by-zero trapping
is not enabled.
is not enabled.
0
The processor has executed an
SDIV
or
UDIV
instruction with
a divisor of 0.
1
When this bit is set, the PC value stacked for the exception return points
to the instruction that performed the divide by zero.
to the instruction that performed the divide by zero.
Trapping on divide-by-zero is enabled by setting the
DIV0
bit in the
Configuration and Control (CFGCTRL) register (see page 185).
This bit is cleared by writing a 1 to it.
0
RW1C
DIV0
25
Unaligned Access Usage Fault
Description
Value
No unaligned access fault has occurred, or unaligned access
trapping is not enabled.
trapping is not enabled.
0
The processor has made an unaligned memory access.
1
Unaligned
LDM
,
STM
,
LDRD
, and
STRD
instructions always fault
regardless of the configuration of this bit.
Trapping on unaligned access is enabled by setting the
UNALIGNED
bit
in the CFGCTRL register (see page 185).
This bit is cleared by writing a 1 to it.
0
RW1C
UNALIGN
24
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.
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x00
RO
reserved
23:20
No Coprocessor Usage Fault
Description
Value
A usage fault has not been caused by attempting to access a
coprocessor.
coprocessor.
0
The processor has attempted to access a coprocessor.
1
This bit is cleared by writing a 1 to it.
0
RW1C
NOCP
19
Invalid PC Load Usage Fault
Description
Value
A usage fault has not been caused by attempting to load an
invalid PC value.
invalid PC value.
0
The processor has attempted an illegal load of EXC_RETURN
to the PC as a result of an invalid context or an invalid
EXC_RETURN value.
to the PC as a result of an invalid context or an invalid
EXC_RETURN value.
1
When this bit is set, the PC value stacked for the exception return points
to the instruction that tried to perform the illegal load of the PC.
to the instruction that tried to perform the illegal load of the PC.
This bit is cleared by writing a 1 to it.
0
RW1C
INVPC
18
195
December 13, 2013
Texas Instruments-Advance Information
Tiva
™
TM4C129XNCZAD Microcontroller