參數(shù)資料
型號(hào): EFM32TG222F32
廠商: Energy Micro
文件頁(yè)數(shù): 79/136頁(yè)
文件大?。?/td> 0K
描述: IC MCU 32BIT 32KB FLASH 48LQFP
特色產(chǎn)品: EFM32 Tiny Gecko
標(biāo)準(zhǔn)包裝: 1
系列: Tiny 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(cè)/復(fù)位,DMA,I²S,POR,PWM,WDT
輸入/輸出數(shù): 37
程序存儲(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 4K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 V ~ 3.8 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x12b,D/A 1x12b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 48-TQFP
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: 914-1029-6
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...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
47
www.energymicro.com
op{type}{cond} Rt, [Rn, #offset]!
; pre-indexed
op{type}{cond} Rt, [Rn], #offset
; post-indexed
opD{cond} Rt, Rt2, [Rn {, #offset}]
; immediate offset, two words
opD{cond} Rt, Rt2, [Rn, #offset]!
; pre-indexed, two words
opD{cond} Rt, Rt2, [Rn], #offset
; post-indexed, two words
where:
op
is one of:
LDR
Load Register.
STR
Store Register.
type
is one of:
B
unsigned byte, zero extend to 32 bits on loads.
SB
signed byte, sign extend to 32 bits (LDR only).
H
unsigned halfword, zero extend to 32 bits on loads.
SH
signed halfword, sign extend to 32 bits (LDR only).
#
omit, for word.
cond
is an optional condition code, see Section 3.3.7 (p. 43) .
Rt
is the register to load or store.
Rn
is the register on which the memory address is based.
offset
is an offset from Rn. If offset is omitted, the address is the contents of Rn.
Rt2
is the additional register to load or store for two-word operations.
3.4.2.2 Operation
LDR
instructions load one or two registers with a value from memory.
STR
instructions store one or two register values to memory.
Load and store instructions with immediate offset can use the following addressing modes:
Offset addressing
The offset value is added to or subtracted from the address obtained
from the register Rn. The result is used as the address for the memory
access. The register Rn is unaltered. The assembly language syntax
for this mode is:
[Rn, #offset]
Pre-indexed addressing
The offset value is added to or subtracted from the address obtained
from the register Rn. The result is used as the address for the memory
access and written back into the register Rn. The assembly language
syntax for this mode is:
[Rn, #offset]!
Post-indexed addressing
The address obtained from the register Rn is used as the address
for the memory access. The offset value is added to or subtracted
from the address, and written back into the register Rn. The assembly
language syntax for this mode is:
[Rn], #offset
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