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參數資料
型號: EFM32-TG110F32-SK
廠商: Energy Micro
文件頁數: 50/136頁
文件大小: 0K
描述: IC MICRO KIT GECKO 24QFN
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: 24-QFN
工具箱內容: (2) 914-1033-2-ND - MCU 32BIT 32KB FLASH 24-QFN
其它名稱: 914-1022
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
20
www.energymicro.com
Bits[31:1] of the alias word have no effect on the bit-band bit. Writing 0x01 has the same effect as writing
0xFF
. Writing 0x00 has the same effect as writing 0x0E.
Reading a word in the alias region:
0x00000000 indicates that the targeted bit in the bit-band region is set to zero
0x00000001 indicates that the targeted bit in the bit-band region is set to 1
2.2.5.2 Directly accessing a bit-band region
Section 2.2.3 (p. 16) describes the behavior of direct byte, halfword, or word accesses to the bit-
band regions.
2.2.6 Memory endianness
The processor views memory as a linear collection of bytes numbered in ascending order from
zero. For example, bytes 0-3 hold the first stored word, and bytes 4-7 hold the second stored word.
Section 2.2.6.1 (p. 20) describes how words of data are stored in memory.
2.2.6.1 Little-endian format
The EFM32 uses a little-endian format, in which the processor stores the least significant byte of a word
at the lowest-numbered byte, and the most significant byte at the highest-numbered byte. For example:
Mem ory
Regist er
Address A
A+ 1
lsbyt e
m sbyt e
A+ 2
A+ 3
0
7
B0
B1
B3
B2
31
2423
1615
8 7
0
B0
B1
B2
B3
2.2.7 Synchronization primitives
The Cortex-M3 instruction set includes pairs of synchronization primitives. These provide a non-blocking
mechanism that a thread or process can use to obtain exclusive access to a memory location. Software
can use them to perform a guaranteed read-modify-write memory update sequence, or for a semaphore
mechanism.
A pair of synchronization primitives comprises:
A Load-Exclusive instruction
Used to read the value of a memory location, requesting exclusive
access to that location.
A Store-Exclusive instruction
Used to attempt to write to the same memory location, returning a
status bit to a register. If this bit is:
0
it indicates that the thread or process gained exclusive access to
the memory, and the write succeeds,
1
it indicates that the thread or process did not gain exclusive
access to the memory, and no write is performed,
The pairs of Load-Exclusive and Store-Exclusive instructions are:
相關PDF資料
PDF描述
FAM1-400-400-2.0-1A FAM1 SHEET 400X400X2MM W/ADH
EFM32-TG108F32-SK IC MICRO KIT GECKO 24QFN
FAM1-400-400-1.5-1A FAM1 SHEET 400X400X1.5MM W/ADH
EFM32-G890F128-SK IC MICRO KIT GECKO 112BGA
176C TRANSFORMER AUTO STEP UP/PLG IN
相關代理商/技術參數
參數描述
EFM32TG110F32-T 制造商:Energy Micro AS 功能描述:IC MCU 32BIT 32KB FLASH 24QFN
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