Texas Instruments TM4C1294NCPDT User Manual

Register 81: Floating-Point Context Control (FPCC), offset 0xF34
The FPCC register sets or returns FPU control data.
Floating-Point Context Control (FPCC)
Base 0xE000.E000
Offset 0xF34
Type RW, reset 0xC000.0000
16171819202122232425262728293031
reservedLSPENASPEN
RORORORORORORORORORORORORORORWRWType
0000000000000011Reset
0123456789101112131415
LSPACTUSERreservedTHREADHFRDYMMRDYBFRDYreservedMONRDYreserved
RWRWRORWRWRWRWRORWROROROROROROROType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
Automatic State Preservation Enable
When set, enables the use of the FRACTV bit in the CONTROL register
on execution of a floating-point instruction. This results in automatic
hardware state preservation and restoration, for floating-point context,
on exception entry and exit.
Important:
Two bits control when FPCA can be enabled: the ASPEN
bit in the Floating-Point Context Control (FPCC)
register and the DISFPCA bit in the Auxiliary Control
(ACTLR) register.
1RWASPEN31
Lazy State Preservation Enable
When set, enables automatic lazy state preservation for floating-point
context.
1RWLSPEN30
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.
0x00ROreserved29:9
Monitor Ready
When set, DebugMonitor is enabled and priority permits setting
MON_PEND when the floating-point stack frame was allocated.
0RWMONRDY8
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.
0ROreserved7
Bus Fault Ready
When set, BusFault is enabled and priority permitted setting the BusFault
handler to the pending state when the floating-point stack frame was
allocated.
0RWBFRDY6
Memory Management Fault Ready
When set, MemManage is enabled and priority permitted setting the
MemManage handler to the pending state when the floating-point stack
frame was allocated.
0RWMMRDY5
203June 18, 2014
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TM4C1294NCPDT Microcontroller

Texas Instruments TM4C1294NCPDT Specifications

General

Brand	Texas Instruments
Model	TM4C1294NCPDT
Category	Microcontrollers
Language	English