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参数资料
| 型号： | EFM32-TG-STK3300 |
| 厂商： | Energy Micro |
| 文件页数： | 75/136页 |
| 文件大小： | 0K |
| 描述： | KIT STARTER EFM32 GECKO |
| 特色产品： | EFM32 Tiny Gecko |
| 标准包装： | 1 |
| 系列： | EFM®32 |
| 类型： | MCU |
| 适用于相关产品： | EFM32-TGXXX |
| 所含物品： | 板，线缆，CD 和文档 |
| 其它名称： | 914-1018 |
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...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
43
www.energymicro.com
Note
For B, BL, CBNZ, and CBZ instructions, the value of the PC is the address of the current
instruction plus 4 bytes.
For all other instructions that use labels, the value of the PC is the address of the current
instruction plus 4 bytes, with bit[1] of the result cleared to 0 to make it word-aligned.
Your assembler might permit other syntaxes for PC-relative expressions, such as a label
plus or minus a number, or an expression of the form [PC, #number].
3.3.7 Conditional execution
Most data processing instructions can optionally update the condition flags in the Application Program
Status Register (APSR) according to the result of the operation, see Section 2.1.3.5.1 (p. 9) . Some
instructions update all flags, and some only update a subset. If a flag is not updated, the original value
is preserved. See the instruction descriptions for the flags they affect.
You can execute an instruction conditionally, based on the condition flags set in another instruction,
either:
immediately after the instruction that updated the flags
after any number of intervening instructions that have not updated the flags.
Conditional execution is available by using conditional branches or by adding condition code suffixes
to instructions. See Table 3.4 (p. 44) for a list of the suffixes to add to instructions to make them
conditional instructions. The condition code suffix enables the processor to test a condition based on
the flags. If the condition test of a conditional instruction fails, the instruction:
does not execute
does not write any value to its destination register
does not affect any of the flags
does not generate any exception.
Conditional instructions, except for conditional branches, must be inside an If-Then instruction block. See
Section 3.9.3 (p. 76) for more information and restrictions when using the IT instruction. Depending
on the vendor, the assembler might automatically insert an IT instruction if you have conditional
instructions outside the IT block.
Use the CBZ and CBNZ instructions to compare the value of a register against zero and branch on the
result.
This section describes:
3.3.7.1 The condition flags
The APSR contains the following condition flags:
N Set to 1 when the result of the operation was negative, cleared to 0 otherwise.
Z
Set to 1 when the result of the operation was zero, cleared to 0 otherwise.
C Set to 1 when the operation resulted in a carry, cleared to 0 otherwise.
V
Set to 1 when the operation caused overflow, cleared to 0 otherwise.
For more information about the APSR see Section 2.1.3.5 (p. 8) .
A carry occurs:
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格: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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