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PM0223 bảng dữ liệu(PDF) 74 Page - STMicroelectronics

tên linh kiện PM0223
Giải thích chi tiết về linh kiện  This programming manual provides information for application and system-level software developers
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
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PM0223 bảng dữ liệu(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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