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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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PM0056 数据表(PDF) 97 Page - STMicroelectronics |
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PM0056 数据表(HTML) 97 Page - STMicroelectronics |
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97 / 156 page  DocID15491 Rev 5 97/156 PM0056 The Cortex-M3 instruction set Condition flags These instructions do not change the flags. Examples ADR.W R0, BranchTable_Byte TBB [R0, R1] ; R1 is the index, R0 is the base address of the ; branch table Case1 ; an instruction sequence follows Case2 ; an instruction sequence follows Case3 ; an instruction sequence follows BranchTable_Byte DCB 0 ; Case1 offset calculation DCB ((Case2-Case1)/2) ; Case2 offset calculation DCB ((Case3-Case1)/2) ; Case3 offset calculation TBH [PC, R1, LSL #1] ; R1 is the index, PC is used as base of the ; branch table BranchTable_H DCI ((CaseA - BranchTable_H)/2) ; CaseA offset calculation DCI ((CaseB - BranchTable_H)/2) ; CaseB offset calculation DCI ((CaseC - BranchTable_H)/2) ; CaseC offset calculation CaseA ; an instruction sequence follows CaseB ; an instruction sequence follows CaseC ; an instruction sequence follows 3.9 Miscellaneous instructions Table 32 shows the remaining Cortex-M3 instructions: Table 32. Miscellaneous instructions Mnemonic Brief description See BKPT Breakpoint BKPT on page 98 CPSID Change Processor State, Disable Interrupts CPS on page 98 CPSIE Change Processor State, Enable Interrupts CPS on page 98 DMB Data Memory Barrier DMB on page 99 DSB Data Synchronization Barrier DSB on page 100 ISB Instruction Synchronization Barrier ISB on page 100 MRS Move from special register to register MRS on page 100 MSR Move from register to special register MSR on page 101 |
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