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PM0223 Fiches technique(PDF) 75 Page - STMicroelectronics

No de pièce PM0223
Description  This programming manual provides information for application and system-level software developers
PDF  110 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM0223 Fiches technique(HTML) 75 Page - STMicroelectronics

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PM0223
The STM32L0 Cortex-M0+ Instruction Set
80
3.7.7
MSR
Move the contents of a general-purpose register into the specified special register.
Syntax
MSR spec_reg, Rn
where:
Operation
MSR
updates one of the special registers with the value from the register specified by Rn.
See 3.7.6: MRS on page 74.
Restrictions
In this instruction, Rn must not be SP and must not be PC.
If the current mode of execution is not privileged, then all attempts to modify any register
other than the APSR are ignored.
Condition flags
This instruction updates the flags explicitly based on the value in Rn.
Examples
MSR
CONTROL, R1 ; Read R1 value and write it to the CONTROL register
Rn
Is the general-purpose source register.
spec_reg
Is the special-purpose destination register: APSR, IPSR, EPSR, IEPSR,
IAPSR, EAPSR, PSR, MSP, PSP, PRIMASK,
or CONTROL.



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