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參數資料
| 型號： | EFM32-TG840F32-SK |
| 廠商： | Energy Micro |
| 文件頁數： | 75/136頁 |
| 文件大小： | 0K |
| 描述： | IC MICRO KIT GECKO 64QFN |
| 標準包裝： | 1 |
| 系列： | Tiny Gecko |
| 套件類型： | 微控制器 |
| 值： | 2 件 - 閃存 - 32KB |
| 包裝： | 紙板盒 |
| 安裝類型： | 表面貼裝 |
| 包括封裝： | 64-QFN |
| 工具箱內容： | (2) 914-1036-2-ND - MCU 32BIT 32KB FLASH 64-QFN |
| 其它名稱： | 914-1020 |
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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:
相關PDF資料 |
PDF描述 |
|---|---|
| EFM32-TG822F32-SK | IC MICRO KIT GECKO 48LQFP |
| EFM32-TG222F32-SK | IC MICRO KIT GECKO 48LQFP |
| EFM32-TG230F32-SK | IC MICRO KIT GECKO 64QFN |
| EFM32-TG210F32-SK | IC MICRO KIT GECKO 32QFN |
| 1267 X 6" | TAPE ALUMINUM FOIL 6" X 1FT |
相關代理商/技術參數 |
參數描述 |
|---|---|
| EFM32TG840F32-T | 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 32KB FLASH 64QFN |
| EFM32TG840F8 | 功能描述:ARM微控制器 - MCU 8KB Flash 2KB RAM RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數據總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數據 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 安裝風格:SMD/SMT |
| EFM32TG840F8-QFN64 | 制造商:Energy Micro AS 功能描述:8 FLASH, USART + UART 2, QFN64 - Tape and Reel 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 8KB FLASH 64QFN |
| EFM32TG840F8-QFN64T | 制造商:Energy Micro AS 功能描述:32 BIT ARM MPU, TINY GECKO - Trays |
| EFM32TG840F8-QFN64-T | 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 8KB FLASH 64QFN |
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