参数资料
型号: EFM32TG210F32
厂商: Energy Micro
文件页数: 73/136页
文件大小: 0K
描述: MCU 32BIT 32KB FLASH 32-QFN
特色产品: EFM32 Tiny Gecko
标准包装: 1
系列: Tiny Gecko
核心处理器: ARM? Cortex?-M3
芯体尺寸: 32-位
速度: 32MHz
连通性: EBI/EMI,I²C,IrDA,智能卡,SPI,UART/USART
外围设备: 欠压检测/复位,DMA,POR,PWM,WDT
输入/输出数: 24
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
RAM 容量: 4K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 3.8 V
数据转换器: A/D 4x12b,D/A 1x12b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 32-VQFN 裸露焊盘
包装: 标准包装
其它名称: 914-1034-6
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
41
www.energymicro.com
Figure 3.2. LSR #3
31
1 0
Carry
Flag
...
0
2
3
4
5
3.3.4.3 LSL
Logical shift left by n bits moves the right-hand 32-n bits of the register Rm, to the left by n places, into
the left-hand 32-n bits of the result. And it sets the right#hand n bits of the result to 0. See Figure 3.3 (p.
You can use he LSL #n operation to multiply the value in the register Rm by 2
n, if the value is regarded
as an unsigned integer or a two’s complement signed integer. Overflow can occur without warning.
When the instruction is LSLS or when LSL #n, with non-zero n, is used in Operand2 with the instructions
MOVS
, MVNS, ANDS, ORRS, ORNS, EORS, BICS, TEQ or TST, the carry flag is updated to the last bit shifted
out, bit[32-n], of the register Rm. These instructions do not affect the carry flag when used with LSL #0.
Note
If n is 32 or more, then all the bits in the result are cleared to 0.
If n is 33 or more and the carry flag is updated, it is updated to 0.
Figure 3.3. LSL #3
31
1 0
Carry
Flag
...
0
2
3
4
5
3.3.4.4 ROR
Rotate right by n bits moves the left-hand 32-n bits of the register Rm, to the right by n places, into the
right-hand 32-n bits of the result. And it moves the right#hand n bits of the register into the left#hand
n
bits of the result. See Figure 3.4 (p. 42) .
When the instruction is RORS or when ROR #n is used in Operand2 with the instructions MOVS, MVNS,
ANDS
, ORRS, ORNS, EORS, BICS, TEQ or TST, the carry flag is updated to the last bit rotation, bit[n-1],
of the register Rm.
Note
If n is 32, then the value of the result is same as the value in Rm, and if the carry flag is
updated, it is updated to bit[31] of Rm.
ROR with shift length, n, more than 32 is the same as ROR with shift length n-32.
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