参数资料
型号: AT91SAM9XE128-QU
厂商: Atmel
文件页数: 88/159页
文件大小: 0K
描述: MCU ARM9 128K FLASH 208-PQFP
产品培训模块: MCU Product Line Introduction
标准包装: 24
系列: SAM9XE
核心处理器: ARM9
芯体尺寸: 16/32-位
速度: 180MHz
连通性: EBI/EMI,以太网,I²C,MMC,SPI,SSC,UART/USART,USB
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 96
程序存储器容量: 128KB(128K x 8)
程序存储器类型: 闪存
RAM 容量: 40K x 8
电压 - 电源 (Vcc/Vdd): 1.65 V ~ 1.95 V
数据转换器: A/D 4x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 208-MQFP,208-PQFP
包装: 托盘
配用: AT91SAM9XE-EK-ND - KIT EVAL FOR AT91SAM9XE
AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9
PIC16F5X
DS41213D-page 22
2007 Microchip Technology Inc.
4.3
External Crystal Oscillator Circuit
Either a pre-packaged oscillator or a simple oscillator
circuit with TTL gates can be used as an external
crystal oscillator circuit. Pre-packaged oscillators
provide a wide operating range and better stability. A
well designed crystal oscillator will provide good perfor-
mance with TTL gates. Two types of crystal oscillator
circuits can be used: one with parallel resonance or one
with series resonance.
Figure 4-3 shows an implementation example of a
parallel resonant oscillator circuit. The circuit is
designed to use the fundamental frequency of the
crystal. The 74AS04 inverter performs the 180
° phase
shift that a parallel oscillator requires. The 4.7 k
Ω
resistor provides the negative feedback for stability.
The 10 k
Ω potentiometers bias the 74AS04 in the
linear region. This circuit could be used for external
oscillator designs.
FIGURE 4-3:
EXTERNAL PARALLEL
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
(USING XT, HS OR LP
OSCILLATOR MODE)
Figure 4-4 shows a series resonant oscillator circuit.
This circuit is also designed to use the fundamental
frequency of the crystal. The inverters perform a 360
°
phase shift in a series resonant oscillator circuit. The
330 k
Ω resistors provide the negative feedback to bias
the inverters in their linear region.
FIGURE 4-4:
EXTERNAL SERIES
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
(USING XT, HS OR LP
OSCILLATOR MODE)
4.4
RC Oscillator
For applications where precise timing is not a require-
ment, the RC oscillator option is available. The
operation and functionality of the RC oscillator is
dependent upon a number of variables. The RC
oscillator frequency is a function of:
Supply voltage
Resistor (REXT) and capacitor (CEXT) values
Operating temperature.
The oscillator frequency will vary from unit to unit due
to normal process parameter variation. The difference
in lead frame capacitance between package types will
also affect the oscillation frequency, especially for low
CEXT values. The user also needs to account for the
tolerance of the external R and C components.
how
the
R/C combination is
connected.
The oscillator frequency, divided by 4, is available on
the OSC2/CLKOUT pin and can be used for test
purposes or to synchronize other logic.
FIGURE 4-5:
RC OSCILLATOR MODE
20 pF
+5V
20 pF
10k
4.7k
10k
74AS04
XTAL
10k
74AS04
PIC16F5X
CLKIN
To Other
Devices
OSC2
Open
330
74AS04
PIC16F5X
CLKIN
To Other
Devices
XTAL
330
74AS04
0.1
μF
OSC2
KK
Open
VDD
REXT
CEXT
VSS
OSC1
Internal
clock
OSC2/CLKOUT
FOSC/4
PIC16F5X
N
相关PDF资料
PDF描述
83-878 UHF RECEPTACLE REAR MOUNT PANEL
ADUC842BSZ62-3 IC ADC/DAC 12BIT W/MCU 52MQFP
AR215A222J4R CAP CER 2200PF 50V 5% RADIAL
ADUC842BSZ62-5 IC ADC/DAC 12BIT W/MCU 52-MQFP
082-4426-11RFX CONN PLUG N BELDEN 89880, 9880
相关代理商/技术参数
参数描述
AT91SAM9XE256 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers
AT91SAM9XE256B-CU 功能描述:IC MCU 32BIT 256KB FLASH 217BGA 制造商:microchip technology 系列:SAM9XE 包装:托盘 零件状态:在售 核心处理器:ARM9? 核心尺寸:16/32-位 速度:180MHz 连接性:EBI/EMI,以太网,I2C,存储卡,SPI,SSC,UART/USART,USB 外设:欠压检测/复位,POR,PWM,WDT I/O 数:96 程序存储容量:256KB(256K x 8) 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:56K x 8 电压 - 电源(Vcc/Vdd):1.65 V ~ 1.95 V 数据转换器:A/D 4x10b 振荡器类型:内部 工作温度:-40°C ~ 85°C(TA) 封装/外壳:217-LFBGA 供应商器件封装:217-BGA(15x15) 标准包装:126
AT91SAM9XE256-CU 功能描述:ARM微控制器 - MCU BGA IND TEMP RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT
AT91SAM9XE256-QU 功能描述:ARM微控制器 - MCU PQFP IND TEMP RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 处理器系列:STM32F373xx 数据总线宽度:32 bit 最大时钟频率:72 MHz 程序存储器大小:256 KB 数据 RAM 大小:32 KB 片上 ADC:Yes 工作电源电压:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作温度范围:- 40 C to + 85 C 封装 / 箱体:LQFP-48 安装风格:SMD/SMT
AT91SAM9XE512 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers