参数资料
型号: ATSAM3N2BA-MU
厂商: Atmel
文件页数: 31/60页
文件大小: 0K
描述: MCU FLASH 64-QFN
产品培训模块: Touch Solutions on the Atmel ARM? Cortex?-M3 Based Flash Microcontrollers
特色产品: SAM3N Flash MCU
标准包装: 260
系列: SAM3N
核心处理器: ARM? Cortex?-M3
芯体尺寸: 32-位
速度: 48MHz
连通性: I²C,IrDA,SPI,UART/USART
外围设备: 欠压检测/复位,DMA,POR,PWM,WDT
输入/输出数: 47
程序存储器容量: 128KB(128K x 8)
程序存储器类型: 闪存
RAM 容量: 16K x 8
电压 - 电源 (Vcc/Vdd): 1.62 V ~ 3.6 V
数据转换器: A/D 10x10b,D/A 1x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-VFQFN 裸露焊盘
包装: 托盘
37
11011BS–ATARM–22-Feb-12
SAM3N Summary
The reset circuitry is based on a zero-power power-on reset cell and a brownout detector cell.
The zero-power power-on reset allows the Supply Controller to start properly, while the soft-
ware-programmable brownout detector allows detection of either a battery discharge or main
voltage loss.
The Slow Clock generator is based on a 32 kHz crystal oscillator and an embedded 32 kHz RC
oscillator. The Slow Clock defaults to the RC oscillator, but the software can enable the crystal
oscillator and select it as the Slow Clock source.
The Supply Controller starts up the device by sequentially enabling the internal power switches
and the Voltage Regulator, then it generates the proper reset signals to the core power supply.
It also enables to set the system in different low power modes and to wake it up from a wide
range of events.
10.5
Clock Generator
The Clock Generator is made up of:
One Low Power 32768Hz Slow Clock Oscillator with bypass mode
One Low-Power RC Oscillator
One 3-20 MHz Crystal or Ceramic resonator Oscillator, which can be bypassed
One Fast RC Oscillator factory programmed, 3 output frequencies can be selected: 4, 8 or 12
MHz. By default 4 MHz is selected.
One 60 to 130 MHz programmable PLL, capable to provide the clock MCK to the processor
and to the peripherals. The input frequency of PLL is from 3.5 to 20 MHz.
Figure 10-2. Clock Generator Block Diagram
XIN
XOUT
Main Clock
MAINCK
Slow Clock
SLCK
XIN32
XOUT32
Clock Generator
XTALSEL
MAINSEL
Power
Management
Controller
Control
Status
PLL and
Divider A
PLLA Clock
PLLACK
3-20 MHz
Main
Oscillator
Slow Clock
Oscillator
On Chip
12/8/4 MHz
RC OSC
On Chip 32 kHz
RC OSC
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