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PM0223 датащи(PDF) 74 Page - STMicroelectronics

номер детали PM0223
подробное описание детали  This programming manual provides information for application and system-level software developers
PDF  110 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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PM0223 датащи(HTML) 74 Page - STMicroelectronics

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The STM32L0 Cortex-M0+ Instruction Set
PM0223
74/110
DocID025763 Rev 1
3.7.6
MRS
Move the contents of a special register to a general-purpose register.
Syntax
MRS Rd, spec_reg
where:
Operation
MSR
stores the contents of a special-purpose register to a general-purpose register. The
MSR
instruction can be combined with the MSR instruction to produce read-modify-write
sequences, which are suitable for modifying a specific flag in the PSR.
See 3.7.7: MSR on page 75.
Restrictions
In this instruction, Rd must not be SP or PC.
If the current mode of execution is not privileged, then the values of all registers other than
the APSR read as zero.
Condition flags
This instruction does not change the flags.
Examples
MRS
R0, PRIMASK ; Read PRIMASK value and write it to R0
Rd
Is the general-purpose destination register.
spec_reg
Is one of the special-purpose registers: APSR, IPSR, EPSR, IEPSR,
IAPSR, EAPSR, PSR, MSP, PSP, PRIMASK,
or CONTROL.



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