參數(shù)資料
型號: AT91SAM7A3-AU
廠商: Atmel
文件頁數(shù): 10/39頁
文件大小: 0K
描述: IC ARM7 MCU FLASH 256K 100LQFP
產(chǎn)品培訓模塊: SAM9 MPU Boot Solutions & Application Deployment
MCU Product Line Introduction
標準包裝: 90
系列: AT91SAM
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 60MHz
連通性: CAN,I²C,MMC,SPI,SSC,UART/USART
外圍設備: POR,PWM,WDT
輸入/輸出數(shù): 62
程序存儲器容量: 256KB(256K x 8)
程序存儲器類型: 閃存
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 1.65 V ~ 1.95 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 100-LQFP
包裝: 托盤
配用: AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9
AT91SAM7A3-EK-ND - KIT EVAL FOR AT91SAM7A3
18
6042DS–ATARM–14-Dec-06
AT91SAM7A3
The Embedded Flash Controller also provides a dual 32-bit Prefetch Buffer that optimizes 16-bit
access to the Flash. This is particularly efficient when the processor is running in Thumb mode.
8.3.3
Lock Regions
The Embedded Flash Controller manages 16 lock bits to protect 16 regions of the Flash against
inadvertent Flash erasing or programming commands.
The AT91SAM7A3 has 16 lock regions. Each lock region contains 16 pages of 256 bytes. Each
lock region has a size of 4 Kbytes, thus only the first 64 Kbytes can be locked.
The 16 NVM bits are software programmable through the EFC User Interface. The command
“Set Lock Bit” activates the protection. The command “Clear Lock Bit” unlocks the lock region.
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