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參數(shù)資料
| 型號： | EFM32-TG-STK3300 |
| 廠商： | Energy Micro |
| 文件頁數(shù)： | 112/136頁 |
| 文件大小： | 0K |
| 描述： | KIT STARTER EFM32 GECKO |
| 特色產(chǎn)品： | EFM32 Tiny Gecko |
| 標準包裝： | 1 |
| 系列： | EFM®32 |
| 類型： | MCU |
| 適用于相關(guān)產(chǎn)品： | EFM32-TGXXX |
| 所含物品： | 板，線纜，CD 和文檔 |
| 其它名稱： | 914-1018 |
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...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
77
www.energymicro.com
3.9.3.2 Operation
The IT instruction makes up to four following instructions conditional. The conditions can be all the
same, or some of them can be the logical inverse of the others. The conditional instructions following
the IT instruction form the IT block.
The instructions in the IT block, including any branches, must specify the condition in the {cond} part
of their syntax.
Note
Your assembler might be able to generate the required IT instructions for conditional
instructions automatically, so that you do not need to write them yourself. See your
assembler documentation for details.
A BKPT instruction in an IT block is always executed, even if its condition fails.
Exceptions can be taken between an IT instruction and the corresponding IT block, or within an IT block.
Such an exception results in entry to the appropriate exception handler, with suitable return information
in LR and stacked PSR.
Instructions designed for use for exception returns can be used as normal to return from the exception,
and execution of the IT block resumes correctly. This is the only way that a PC#modifying instruction is
permitted to branch to an instruction in an IT block.
3.9.3.3 Restrictions
The following instructions are not permitted in an IT block:
IT
CBZ and CBNZ
CPSID and CPSIE.
Other restrictions when using an IT block are:
a branch or any instruction that modifies the PC must either be outside an IT block or must be the
last instruction inside the IT block. These are:
ADD PC, PC, Rm
MOV PC, Rm
B, BL, BX, BLX
any LDM, LDR, or POP instruction that writes to the PC
TBB and TBH
do not branch to any instruction inside an IT block, except when returning from an exception handler
all conditional instructions except Bcond must be inside an IT block. Bcond can be either outside or
inside an IT block but has a larger branch range if it is inside one
each instruction inside the IT block must specify a condition code suffix that is either the same or
logical inverse as for the other instructions in the block.
Note
Your assembler might place extra restrictions on the use of IT blocks, such as prohibiting
the use of assembler directives within them.
3.9.3.4 Condition flags
This instruction does not change the flags.
3.9.3.5 Example
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EFM32TG-STK3300 | 制造商:Energy Micro AS 功能描述:STARTER KIT STK3300 TINY GEC 制造商:Energy Micro AS 功能描述:STARTER KIT, STK3300, TINY GECKO; Silicon Manufacturer:Energy Micro; Core Architecture:ARM; Core Sub-Architecture:Cortex-M3; Silicon Core Number:EFM32TG840; Silicon Family Name:EFM32; Kit Contents:Starter Kit EFM32TG840; SVHC:No SVHC;RoHS Compliant: Yes |
| EFM32WG230F128 | 功能描述:ARM微控制器 - MCU 128kb flash 32kb RAM RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT |
| EFM32WG230F128-QFN64 | 制造商:Energy Micro AS 功能描述:32 BIT ARM MPU, WONDER GECKO - Tape and Reel 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 128KB FLASH 64QFN |
| EFM32WG230F128-QFN64T | 制造商:Energy Micro AS 功能描述:WONDER GECKO 32 BIT ARM CORTEX MCU - Trays |
| EFM32WG230F128-QFN64-T | 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 128KB FLASH 64QFN |
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