參數(shù)資料
型號: ATSAM3N4BA-AU
廠商: Atmel
文件頁數(shù): 32/60頁
文件大小: 0K
描述: MCU FLASH 64-QFP
產(chǎn)品培訓模塊: Touch Solutions on the Atmel ARM? Cortex?-M3 Based Flash Microcontrollers
特色產(chǎn)品: SAM3N Flash MCU
標準包裝: 160
系列: SAM3N
核心處理器: ARM? Cortex?-M3
芯體尺寸: 32-位
速度: 48MHz
連通性: I²C,IrDA,SPI,UART/USART
外圍設備: 欠壓檢測/復位,DMA,POR,PWM,WDT
輸入/輸出數(shù): 47
程序存儲器容量: 256KB(256K x 8)
程序存儲器類型: 閃存
RAM 容量: 24K x 8
電壓 - 電源 (Vcc/Vdd): 1.62 V ~ 3.6 V
數(shù)據(jù)轉換器: A/D 10x10b,D/A 1x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-TQFP
包裝: 托盤
38
11011BS–ATARM–22-Feb-12
SAM3N Summary
10.6
Power Management Controller
The Power Management Controller provides all the clock signals to the system. It provides:
the Processor Clock HCLK
the Free running processor clock FCLK
the Cortex SysTick external clock
the Master Clock MCK, in particular to the Matrix and the memory interfaces
independent peripheral clocks, typically at the frequency of MCK
three programmable clock outputs: PCK0, PCK1 and PCK2
The Supply Controller selects between the 32 kHz RC oscillator or the crystal oscillator. The
unused oscillator is disabled automatically so that power consumption is optimized.
By default, at startup the chip runs out of the Master Clock using the Fast RC Oscillator running
at 4 MHz.
The user can trim by software the 8 and 12 MHz RC Oscillator frequency.
Figure 10-3. SAM3N4/2/1/0/00 Power Management Controller Block Diagram
The SysTick calibration value is fixed at 6000 which allows the generation of a time base of 1 ms
with SysTick clock at 6 MHz (48 MHz/8)
10.7
Watchdog Timer
16-bit key-protected only-once-Programmable Counter
Windowed, prevents the processor to be in a dead-lock on the watchdog access
MCK
periph_clk[..]
int
SLCK
MAINCK
Prescaler
/1,/2,/4,..,/64
HCK
Processor
Clock
Controller
Sleep Mode
Master Clock Controller
Peripherals
Clock Controller
ON/OFF
SLCK
MAINCK
Prescaler
/1,/2,/4,..,/64
Programmable Clock Controller
pck[..]
ON/OFF
FCLK
SystTick
Divider
/8
PLLCK
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