参数资料
| 型号： | AT91SAM7A3-AU |
| 厂商： | Atmel |
| 文件页数： | 2/39页 |
| 文件大小： | 0K |
| 描述： | IC ARM7 MCU FLASH 256K 100LQFP |
| 产品培训模块： | SAM9 MPU Boot Solutions & Application Deployment MCU Product Line Introduction |
| 标准包装： | 90 |
| 系列： | AT91SAM |
| 核心处理器： | ARM7 |
| 芯体尺寸： | 16/32-位 |
| 速度： | 60MHz |
| 连通性： | CAN，I²C，MMC，SPI，SSC，UART/USART |
| 外围设备： | POR，PWM，WDT |
| 输入/输出数： | 62 |
| 程序存储器容量： | 256KB（256K x 8） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 32K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 数据转换器： | A/D 8x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 100-LQFP |
| 包装： | 托盘 |
| 配用： | AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9 AT91SAM7A3-EK-ND - KIT EVAL FOR AT91SAM7A3 |
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10
6042DS–ATARM–14-Dec-06
AT91SAM7A3
5.
Power Considerations
5.1
Power Supplies
The AT91SAM7A3 has five types of power supply pins:
VDD3V3 pins. They power the voltage regulator, the I/O lines, the Flash and the USB
transceivers; voltage ranges from 3.0V to 3.6V, 3.3V nominal.
VDD1V8 pins. They are the outputs of the 1.8V voltage regulator and they power the logic of
the device.
VDDPLL pin. It powers the PLL; voltage ranges from 1.65V to 1.95V, 1.8V typical. They can
be connected to the VDD1V8 pin with decoupling capacitor.
VDDBU pin. It powers the Slow Clock oscillator and the Real Time Clock, as well as a part of
the System Controller; ranges from 3.0V and 3.6V, 3.3V nominal.
VDDANA pin. It powers the ADC; ranges from 3.0V and 3.6V, 3.3V nominal.
No separate ground pins are provided for the different power supplies. Only GND pins are pro-
vided and should be connected as shortly as possible to the system ground plane.
5.2
Voltage Regulator
The AT91SAM7A3 embeds a voltage regulator that consumes less than 120 A static current
and draws up to 130 mA of output current.
Adequate output supply decoupling is mandatory for VDD1V8 (pin 99)to reduce ripple and avoid
oscillations. The best way to achieve this is to use two capacitors in parallel: one external 470 pF
(or 1 nF) NPO capacitor must be connected between VDD1V8 and GND as close to the chip as
possible. One external 3.3 F (or 4.7 F) X7R capacitor must be connected between VDD1V8
and GND.
All other VDD1V8 pins must be externally connected and have a proper decoupling capacitor (at
least 100 nF).
Adequate input supply decoupling is mandatory for VDD3V3 (pin 100) in order to improve star-
tup stability and reduce source voltage drop. The input decoupling capacitor should be placed
close to the chip. For example, two capacitors can be used in parallel: 100 nF NPO and 4.7 F
X7R.
All other VDD3V3 pins must be externally connected and have a proper decoupling capacitor (at
least 100 nF).
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| AT91SAM7SE256-AU | IC ARM7 MCU FLASH 256K 128-LQFP |
| AT91SAM7SE32-AU | MCU ARM 32K HS FLASH 128-LQFP |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT91SAM7A3-EK | 功能描述:开发板和工具包 - ARM Eval Kit for AT91SAM7A3 apps RoHS:否 制造商:Arduino 产品:Development Boards 工具用于评估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口类型:DAC, ICSP, JTAG, UART, USB 工作电源电压:3.3 V |
| AT91SAM7L128 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb-based Microcontroller |
| AT91SAM7L128-AU | 功能描述:ARM微控制器 - MCU 128KB Flash 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 |
| AT91SAM7L128-CU | 功能描述:ARM微控制器 - MCU 128KB Flash 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 |
| AT91SAM7L128PRE | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:numberHigh-performance 32-bit RISC Architecture |
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