參數(shù)資料
型號: EFM32G842F128
廠商: Energy Micro
文件頁數(shù): 27/136頁
文件大?。?/td> 0K
描述: IC MCU 32BIT 128KB FLASH 64LQFP
標準包裝: 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
外圍設備: 欠壓檢測/復位,DMA,LCD,POR,PWM,WDT
輸入/輸出數(shù): 53
程序存儲器容量: 128KB(128K x 8)
程序存儲器類型: 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: 標準包裝
其它名稱: 914-1028-6
...the world's most energy friendly microcontrollers
2011-02-04 - d0002_Rev1.00
122
www.energymicro.com
; R3 = size, attributes in one
LDR R0, =MPU_RNR
; 0xE000ED98, MPU region number register
STR R1, [R0, #0x0]
; Region Number
STR R2, [R0, #0x4]
; Region Base Address
STR R3, [R0, #0x8]
; Region Attribute, Size and Enable
Use an STM instruction to optimize this:
; R1 = region number
; R2 = address
; R3 = size, attributes in one
LDR R0, =MPU_RNR
; 0xE000ED98, MPU region number register
STM R0, {R1-R3}
; Region Number, address, attribute, size and enable
You can do this in two words for pre-packed information. This means that the RBAR contains the required
region number and had the VALID bit set to 1, see Section 4.5.4 (p. 117) . Use this when the data is
statically packed, for example in a boot loader:
; R1 = address and region number in one
; R2 = size and attributes in one
LDR R0, =MPU_RBAR
; 0xE000ED9C, MPU Region Base register
STR R1, [R0, #0x0]
; Region base address and
; region number combined with VALID (bit 4) set to 1
STR R2, [R0, #0x4]
; Region Attribute, Size and Enable
Use an STM instruction to optimize this:
; R1 = address and region number in one
; R2 = size and attributes in one
LDR R0,=MPU_RBAR
; 0xE000ED9C, MPU Region Base register
STM R0, {R1-R2}
; Region base address, region number and VALID bit,
; and Region Attribute, Size and Enable
4.5.8.3 Subregions
Regions of 256 bytes or more are divided into eight equal-sized subregions. Set the corresponding bit
in the SRD field of the RASR to disable a subregion, see Section 4.5.5 (p. 117) . The least significant
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EFM32G842F128G-E-QFP64 功能描述:128K FLASH, 16K RAM, 4X22 LCD, A 制造商:silicon labs 系列:Gecko 包裝:托盤 零件狀態(tài):在售 核心處理器:ARM? Cortex?-M3 核心尺寸:32-位 速度:32MHz 連接性:I2C,IrDA,智能卡,SPI,UART/USART 外設:欠壓檢測/復位,DMA,LCD,POR,PWM,WDT I/O 數(shù):53 程序存儲容量:128KB(128K x 8) 程序存儲器類型:閃存 EEPROM 容量:- RAM 容量:16K x 8 電壓 - 電源(Vcc/Vdd):1.98 V ~ 3.8 V 數(shù)據(jù)轉換器:A/D 8x12b,D/A 2x12b 振蕩器類型:內部 工作溫度:-40°C ~ 85°C(TA) 封裝/外殼:64-TQFP 供應商器件封裝:64-TQFP(10x10) 標準包裝:160
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