參數(shù)資料
型號(hào): EFM32G842F128
廠商: Energy Micro
文件頁數(shù): 99/136頁
文件大小: 0K
描述: IC MCU 32BIT 128KB FLASH 64LQFP
標(biāo)準(zhǔn)包裝: 1
系列: Gecko
核心處理器: ARM? Cortex?-M3
芯體尺寸: 32-位
速度: 32MHz
連通性: I²C,IrDA,智能卡,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,DMA,LCD,POR,PWM,WDT
輸入/輸出數(shù): 53
程序存儲(chǔ)器容量: 128KB(128K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 16K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.8 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x12b,D/A 2x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-TQFP
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: 914-1028-6
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
65
www.energymicro.com
where:
op
is any of:
REV
Reverse byte order in a word.
REV16
Reverse byte order in each halfword independently.
REVSH
Reverse byte order in the bottom halfword, and sign extend to 32 bits.
RBIT
Reverse the bit order in a 32#bit word.
cond
is an optional condition code, see Section 3.3.7 (p. 43) .
Rd
is the destination register.
Rn
is the register holding the operand.
3.5.8.2 Operation
Use these instructions to change endianness of data:
REV
converts 32#bit big#endian data into little#endian data or 32#bit little#endian data into
big#endian data.
REV16
converts 16#bit big#endian data into little#endian data or 16#bit little#endian data into
big#endian data.
REVSH
converts either:
16#bit signed big#endian data into 32#bit signed little#endian data
16#bit signed little#endian data into 32#bit signed big#endian data.
3.5.8.3 Restrictions
Do not use SP and do not use PC.
3.5.8.4 Condition flags
These instructions do not change the flags.
3.5.8.5 Examples
REV
R3, R7
; Reverse byte order of value in R7 and write it to R3
REV16
R0, R0
; Reverse byte order of each 16-bit halfword in R0
REVSH
R0, R5
; Reverse Signed Halfword
REVHS
R3, R7
; Reverse with Higher or Same condition
RBIT
R7, R8
; Reverse bit order of value in R8 and write the result to R7
3.5.9 TST and TEQ
Test bits and Test Equivalence.
3.5.9.1 Syntax
TST{cond} Rn, Operand2
TEQ{cond} Rn, Operand2
where:
cond
is an optional condition code, see Section 3.3.7 (p. 43) .
Rn
is the register holding the first operand.
Operand2
is a flexible second operand. See Section 3.3.3 (p. 38) for details of the options.
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