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参数资料
型号： EFM32-TG-STK3300
厂商： Energy Micro
文件页数： 105/136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
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
70
www.energymicro.com
where:
op
is one of:
SSAT
Saturates a signed value to a signed range.
USAT
Saturates a signed value to an unsigned range.
cond
is an optional condition code, see Section 3.3.7 (p. 43) .
Rd
is the destination register.
n
specifies the bit position to saturate to:
n ranges from 1 to 32 for SSAT
n ranges from 0 to 31 for USAT.
Rm
is the register containing the value to saturate.
shift#s
is an optional shift applied to Rm before saturating. It must be one of
the following:
ASR #s
where s is in the range 1 to 31
LSL #s
where s is in the range 0 to 31.
3.7.1.2 Operation
These instructions saturate to a signed or unsigned n-bit value.
The SSAT instruction applies the specified shift, then saturates to the signed range #2
n
–1 # x # 2n–1#1.
The USAT instruction applies the specified shift, then saturates to the unsigned range 0 # x # 2
n#1.
For signed n-bit saturation using SSAT, this means that:
if the value to be saturated is less than #2
n#1, the result returned is #2n-1
if the value to be saturated is greater than 2
n#1#1, the result returned is 2n-1#1
otherwise, the result returned is the same as the value to be saturated.
For unsigned n-bit saturation using USAT, this means that:
if the value to be saturated is less than 0, the result returned is 0
if the value to be saturated is greater than 2
n#1, the result returned is 2n#1
otherwise, the result returned is the same as the value to be saturated.
If the returned result is different from the value to be saturated, it is called saturation. If saturation occurs,
the instruction sets the Q flag to 1 in the APSR. Otherwise, it leaves the Q flag unchanged. To clear the
Q flag to 0, you must use the MSR instruction, see Section 3.10.7 (p. 83) .
To read the state of the Q flag, use the MRS instruction, see Section 3.10.6 (p. 83) .
3.7.1.3 Restrictions
Do not use SP and do not use PC.
3.7.1.4 Condition flags
These instructions do not affect the condition code flags.
If saturation occurs, these instructions set the Q flag to 1.
3.7.1.5 Examples
SSAT
R7, #16, R7, LSL #4
; Logical shift left value in R7 by 4, then
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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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