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PM0223 数据表(PDF) 75 Page - STMicroelectronics |
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PM0223 数据表(HTML) 75 Page - STMicroelectronics |
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75 / 110 page  DocID025763 Rev 1 75/110 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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