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参数资料
| 型号： | AT89EB5114-TGSIL |
| 厂商： | ATMEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Low-pin-count 8-bit microcontroller with A/D converter |
| 中文描述： | 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDSO20 |
| 封装： | SO-20 |
| 文件页数： | 9/95页 |
| 文件大小： | 1126K |
| 代理商： | AT89EB5114-TGSIL |
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9
4311A–8051–01/05
Power Monitor
The Power Monitor function supervises the evolution of the voltages feeding the micro-
controller, and if needed, suspends its activity when the detected value is out of
specification.
It warrants
proper startup when AT8xEB5114 is powered up and prevents code execu-
tion errors when the power supply becomes lower than the functional threshold.
This chapter describes the functions of the power monitor.
Description
In order to startup and to properly maintain the microcontroller operation, Vcc has to be
stabilized in the Vcc operating range and the oscillator has to be stabilized with a nomi-
nal amplitude compatible with logic threshold.
In order to be sure the oscillator is stabilized, there is an internal counter which main-
tains the reset during 1024 clock periods in case the oscillator selected is the OSC A
and 64 clock periods in case the oscillator used is OSC B or OSC C.
This control is carried out during three phases: the power-up, normal operation and
stop. In accordance with the following requirements:
it guarantees an operational Reset when the microcontroller is powered-up, and
a protection if the power supply goes below minimum operating Vcc
Figure 2.
Power Monitor Block Diagram
Power Monitor diagram
The Power Monitor monitors the power-supply in order to detect any voltage drops
which are not in the target specification. The power monitor block verifies two kinds of
situation that may occur:
during the power-up condition, when Vcc reaches the product specification,
during a steady-state condition, when Vcc is at nominal value but disturbed by any
undesired voltage drops.
Figure 2 shows some configurations which can be handled by the Power Monitor.
PoExternal
Internal RESET
Power Fail
Detector
Power up
Detector
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT89EB5114-TGSUL | 功能描述:8位微控制器 -MCU A/D 4K Flash 256EE RC 4PWM SO20 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| AT89EMK-01 | 功能描述:EMULATOR FOR MP3 SND1 MCU RoHS:否 类别:编程器，开发系统 >> 内电路编程器、仿真器以及调试器 系列:Keil 产品变化通告:Development Systems Discontinuation 19/Jul/2010 标准包装:1 系列:* 类型:* 适用于相关产品:* 所含物品:* |
| AT89EVK-01 | 功能描述:开发板和工具包 - 8051 AT83C24 Kit for TDA8004/8024 rplcmnt RoHS:否 制造商:Silicon Labs 产品:Development Kits 工具用于评估:C8051F960, Si7005 核心: 接口类型:USB 工作电源电压: |
| AT89ISP | 功能描述:电缆组件 ISP CABLE FOR 89S SERIES - ISP CABLE RoHS:否 制造商:Molex 产品:Power Assemblies 类型:Cable Assembly 连接器端口 A:No Connector 连接器端口 A 管脚计数:4 连接器端口 B:No Connector 连接器端口 B 管脚计数: 型式:Male 线规 - 美国线规（AWG）:20, 28 长度:0.305 m 颜色:Black, Red |
| AT89LP2052-16PI | 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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