Texas Instruments CC2650DK Benutzerhandbuch
Cortex-M3 Processor Registers
Table 2-127. CCR Register Field Descriptions (continued)
Bit
Field
Type
Reset
Description
0
NONBASETHREDENA
R/W
X
Indicates how the processor enters Thread mode: 0: Processor can
enter Thread mode only when no exception is active. 1: Processor
can enter Thread mode from any level using the appropriate return
value (EXC_RETURN). Exception returns occur when one of the
following instructions loads a value of 0xFXXXXXXX into the PC
while in Handler mode: - POP/LDM which includes loading the PC. -
LDR with PC as a destination. - BX with any register. The value
written to the PC is intercepted and is referred to as the
EXC_RETURN value.
enter Thread mode only when no exception is active. 1: Processor
can enter Thread mode from any level using the appropriate return
value (EXC_RETURN). Exception returns occur when one of the
following instructions loads a value of 0xFXXXXXXX into the PC
while in Handler mode: - POP/LDM which includes loading the PC. -
LDR with PC as a destination. - BX with any register. The value
written to the PC is intercepted and is referred to as the
EXC_RETURN value.
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SWCU117A – February 2015 – Revised March 2015
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