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参数资料
型号： EFM32G842F128
厂商： Energy Micro
文件页数： 102/136页
文件大小： 0K
描述： IC MCU 32BIT 128KB FLASH 64LQFP
标准包装： 1
系列： Gecko
核心处理器： ARM? Cortex?-M3
芯体尺寸： 32-位
速度： 32MHz
连通性： I²C，IrDA，智能卡，SPI，UART/USART
外围设备： 欠压检测/复位，DMA，LCD，POR，PWM，WDT
输入/输出数： 53
程序存储器容量： 128KB（128K x 8）
程序存储器类型： 闪存
RAM 容量： 16K x 8
电压 - 电源 (Vcc/Vdd)： 1.8 V ~ 3.8 V
数据转换器： A/D 8x12b，D/A 2x12b
振荡器型： 外部
工作温度： -40°C ~ 85°C
封装/外壳： 64-TQFP
包装： 标准包装
其它名称： 914-1028-6
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
68
www.energymicro.com
3.6.1.5 Examples
MUL
R10, R2, R5
; Multiply, R10 = R2 x R5
MLA
R10, R2, R1, R5 ; Multiply with accumulate, R10 = (R2 x R1) + R5
MULS
R0, R2, R2
; Multiply with flag update, R0 = R2 x R2
MULLT
R2, R3, R2
; Conditionally multiply, R2 = R3 x R2
MLS
R4, R5, R6, R7
; Multiply with subtract, R4 = R7 - (R5 x R6)
3.6.2 UMULL, UMLAL, SMULL, and SMLAL
Signed and Unsigned Long Multiply, with optional Accumulate, using 32#bit operands and producing
a 64#bit result.
3.6.2.1 Syntax
op{cond} RdLo, RdHi, Rn, Rm
where:
op
is one of:
UMULL
Unsigned Long Multiply.
UMLAL
Unsigned Long Multiply, with Accumulate.
SMULL
Signed Long Multiply.
SMLAL
Signed Long Multiply, with Accumulate.
cond
is an optional condition code, see Section 3.3.7 (p. 43) .
RdHi, RdLo
are the destination registers. For UMLAL and SMLAL they also hold
the accumulating value.
Rn, Rm
are registers holding the operands.
3.6.2.2 Operation
The UMULL instruction interprets the values from Rn and Rm as unsigned integers. It multiplies these
integers and places the least significant 32 bits of the result in RdLo, and the most significant 32 bits
of the result in RdHi.
The UMLAL instruction interprets the values from Rn and Rm as unsigned integers. It multiplies these
integers, adds the 64#bit result to the 64#bit unsigned integer contained in RdHi and RdLo, and writes
the result back to RdHi and RdLo.
The SMULL instruction interprets the values from Rn and Rm as two’s complement signed integers. It
multiplies these integers and places the least significant 32 bits of the result in RdLo, and the most
significant 32 bits of the result in RdHi.
The SMLAL instruction interprets the values from Rn and Rm as two’s complement signed integers. It
multiplies these integers, adds the 64#bit result to the 64#bit signed integer contained in RdHi and RdLo,
and writes the result back to RdHi and RdLo.
3.6.2.3 Restrictions
In these instructions:
do not use SP and do not use PC
RdHi and RdLo must be different registers.
3.6.2.4 Condition flags
These instructions do not affect the condition code flags.
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相关代理商/技术参数
参数描述
EFM32G842F128G-E-QFP64 功能描述:128K FLASH, 16K RAM, 4X22 LCD, A 制造商:silicon labs 系列:Gecko 包装:托盘 零件状态:在售 核心处理器:ARM? Cortex?-M3 核心尺寸:32-位 速度:32MHz 连接性:I2C，IrDA，智能卡，SPI，UART/USART 外设:欠压检测/复位，DMA，LCD，POR，PWM，WDT I/O 数:53 程序存储容量:128KB（128K x 8） 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:16K x 8 电压 - 电源（Vcc/Vdd）:1.98 V ~ 3.8 V 数据转换器:A/D 8x12b，D/A 2x12b 振荡器类型:内部 工作温度:-40°C ~ 85°C（TA） 封装/外壳:64-TQFP 供应商器件封装:64-TQFP（10x10） 标准包装:160
EFM32G842F128-QFP64 制造商:Energy Micro AS 功能描述:GECKO MCU - Tape and Reel 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 128KB FLASH 64TQFP
EFM32G842F128-QFP64T 制造商:Energy Micro AS 功能描述:32 BIT ARM MPU, GECKO - Trays
EFM32G842F128-QFP64-T 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 128KB FLASH 64TQFP
EFM32G842F128-T 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 128KB FLASH 64TQFP
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