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| 型号： | AT91SAM7X-EK |
| 厂商： | Atmel |
| 文件页数： | 3/44页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR AT91SAM7X256/128 |
| 产品培训模块： | AT91SAM7X and SAM7XC Flash-based Microcontrollers MCU Product Line Introduction |
| 标准包装： | 1 |
| 系列： | AT91SAM 智能 ARM |
| 类型： | MCU |
| 适用于相关产品： | AT91SAM7X256，AT91SAM7X128 |
| 所含物品： | 板，线缆，DVD，电源 |
| 相关产品： | AT91SAM7X256-CU-999-ND - IC MCU ARM7 256KB FLASH 100TFBGA AT91SAM7X128-CU-999-ND - IC MCU ARM7 128KB FLASH 100TFBGA AT91SAM7X128-AU-999-ND - IC MCU ARM7 128KB FLASH 100LQFP AT91SAM7X512-CU-ND - MCU ARM 512K HS FLASH 100-TFBGA AT91SAM7X512-AU-ND - MCU ARM 512K HS FLASH 100-LQFP AT91SAM7X256-CU-ND - MCU ARM 256K HS FLASH 100-TFBGA AT91SAM7X128-CU-ND - MCU ARM 128K HS FLASH 100-TFBGA AT91SAM7X256-AU-999TR-ND - IC ARM7 MCU 256K FLASH 100-LQFP AT91SAM7X256-AU-ND - IC ARM7 MCU FLASH 256K 100LQFP AT91SAM7X128-AU-ND - IC ARM7 MCU FLASH 128K 100LQFP |
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6120GS–ATARM–07-Apr-11
SAM7X512/256/128 Summary
5.
Power Considerations
5.1
Power Supplies
The SAM7X512/256/128 has six types of power supply pins and integrates a voltage regulator,
allowing the device to be supplied with only one voltage. The six power supply pin types are:
VDDIN pin. It powers the voltage regulator and the ADC; voltage ranges from 3.0V to 3.6V,
3.3V nominal. In order to decrease current consumption, if the voltage regulator and the ADC
are not used, VDDIN, ADVREF, AD4, AD5, AD6 and AD7 should be connected to GND. In
this case, VDDOUT should be left unconnected.
VDDOUT pin. It is the output of the 1.8V voltage regulator.
VDDIO pin. It powers the I/O lines; voltage ranges from 3.0V to 3.6V, 3.3V nominal.
VDDFLASH pin. It powers the USB transceivers and a part of the Flash and is required for
the Flash to operate correctly; voltage ranges from 3.0V to 3.6V, 3.3V nominal.
VDDCORE pins. They power the logic of the device; voltage ranges from 1.65V to 1.95V,
1.8V typical. It can be connected to the VDDOUT pin with decoupling capacitor. VDDCORE
is required for the device, including its embedded Flash, to operate correctly.
VDDPLL pin. It powers the oscillator and the PLL. It can be connected directly to the
VDDOUT pin.
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
Power Consumption
The SAM7X512/256/128 has a static current of less than 60 A on VDDCORE at 25°C, includ-
ing the RC oscillator, the voltage regulator and the power-on reset when the brownout detector
is deactivated. Activating the brownout detector adds 28 A static current.
The dynamic power consumption on VDDCORE is less than 90 mA at full speed when running
out of the Flash. Under the same conditions, the power consumption on VDDFLASH does not
exceed 10 mA.
5.3
Voltage Regulator
The SAM7X512/256/128 embeds a voltage regulator that is managed by the System Controller.
In Normal Mode, the voltage regulator consumes less than 100 A static current and draws 100
mA of output current.
The voltage regulator also has a Low-power Mode. In this mode, it consumes less than 25 A
static current and draws 1 mA of output current.
Adequate output supply decoupling is mandatory for VDDOUT to reduce ripple and avoid oscil-
lations. The best way to achieve this is to use two capacitors in parallel: one external 470 pF (or
1 nF) NPO capacitor should be connected between VDDOUT and GND as close to the chip as
possible. One external 2.2 F (or 3.3 F) X7R capacitor should be connected between VDDOUT
and GND.
Adequate input supply decoupling is mandatory for VDDIN in order to improve startup 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.
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相关代理商/技术参数 |
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| AT91SAM9260 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:AT91 ARM Thumb Microcontrollers |
| AT91SAM9260_06 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Thumb Microcontrollers |
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| AT91SAM9260B-CFU | 功能描述:ARM微控制器 - MCU 32-bit 0.5mm pitch 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 |
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