虫虫首页|资源下载|资源专辑|精品软件
登录|注册

RESET

  • 独立蜂鸣煤气报警

    HT45F43 特性特性特性特性 MCU 特性:内建 2x OPAs & 2x Comparators, EEPROM, HIRC 4MHz + 32K LIRC,节省外部器件 传感器:电化学 Sensor(ME2-CO) 电源电压:9V 碱性电池 高音量蜂鸣器输出:(>85DB) 待机电流:Typ.21uA, Max.27uA 低电压检测:7.5V 自测 / 校准功能 LED 显示:红、黄、绿三颗 LED 指示 使用 HT45F43 内建 OSC & RESET 电路,节省外部器件 使用 HT45F43 内建 OPA 进行 CO Sensor 信号放大,节 省外部器件 WATCHDOG 每 32 秒唤醒一次进行 CO 浓度侦测和电池电压侦测

    标签: 独立 煤气 报警 蜂鸣

    上传时间: 2013-06-16

    上传用户:qunquan

  • LT8900 2.4G RF 射频

    LT8900是LDT公司生产的一款低成本,高集成度的2.4GHZ的无线收发芯片,片上集成发射机,接收机,频率综合器,GFSK调制解调器。发射机支持功率可调,接收机采用数字扩展通信机制,在复杂环境和强干扰条件下,可以达到优良的收发性能。外围电路简单,只需搭配MCU以及少数外围被动器件。LT8900传输GFSK信号,发射功率约为2dBm,最大可以到6dBm。接收机采用低中频结构,接收灵敏度可以达到-87dBm。数字信道能量检测可以随时监控信道质量。 片上的发射接收FIFO寄存器可以和MCU进行通信,存储数据,然后以1Mbps数据率在空中传输。它内置了CRC,FEC,auto-ack和重传机制,可以大大简化系统设计并优化性能。 数字基带支持4线SPI和2线I2C接口,此外还有RESET,Pkt_flag, Fifo_flag三个数字接口。 为了提高电池使用寿命,芯片在各个环节都降低功耗,芯片最低工作电压可以到1.9V,在保持寄存器值条件下,最低电流为1uA。 芯片有QFN24 4*4mm和SSOP16封装,都符合RoHS标准。

    标签: 8900 2.4 LT RF

    上传时间: 2013-04-24

    上传用户:kirivir

  • AN2586_stm32硬件开发入门

    This application note is intended for system designers who require a hardware implementation overview of the development board features such as the power supply, the clock management, the RESET control, the boot mode settings and the debug management. It shows how to use the High-density and Medium-density STM32F10xxx product families and describes the minimum hardware resources required to develop an STM32F10xxx application.

    标签: 2586 stm AN 32

    上传时间: 2013-04-24

    上传用户:epson850

  • 简单、高效USB电源管理IC解决方案

      Linear Technology offers a variety of devices that simplifyconverting power from a USB cable, but the LTC®3455represents the highest level of functional integration yet. The LTC3455 seamlessly manages power flowbetween an AC adapter, USB cable and Li-ion battery,while complying with USB power standards, all from a4mm × 4mm QFN package. In addtion, two high efficiencysynchronous buck converters generate low voltage railswhich most USB-powered peripherals require. TheLTC3455 also provides power-on RESET signals for themicroprocessor, a Hot SwapTM output for poweringmemory cards as well as an uncommitted gain blocksuitable for use as a low-battery comparator or an LDOcontroller. The PCB real estate required for the entire USBpower control circuit and two DC/DC converters is only225mm2.

    标签: USB 电源管理IC 方案

    上传时间: 2013-11-02

    上传用户:名爵少年

  • NCV8503 集成复位输出的LDO稳压器产品简介手册及封装

    NCV8503是一款高精度微功耗电源稳压器。输出电流可达400mA。该器件提供多个级别的输出电压供客户选择:2.5V、3.3V、5.0V,及可调输出版本。在负载为400mA时,最大压降仅为0.6V,电压输出精度在±2.0%以内。当ENABLE=0V时,静态电流低于1uA;如果ENABLE=5V,负载为100uA静态电流仅为200uA。非常适合电池供电设备。支持RESET输出(带DELAY功能),可用于微处理器逻辑控制。当输出电压达到1.0V时,RESET电路即可正常工作。当电源上电及电压跌落于门槛电压时,RESET电路输出复位信号。

    标签: 8503 NCV LDO 集成复位

    上传时间: 2013-11-22

    上传用户:xieguodong1234

  • C8051F020

    HIGH SPEED 8051 μC CORE - Pipe-lined Instruction Architecture; Executes 70% of Instructions in 1 or 2 System Clocks - Up to 25MIPS Throughput with 25MHz System Clock - 22 Vectored Interrupt Sources MEMORY - 4352 Bytes Internal Data RAM (256 + 4k) - 64k Bytes In-System Programmable FLASH Program Memory - External Parallel Data Memory Interface – up to 5Mbytes/sec DIGITAL PERIPHERALS - 64 Port I/O; All are 5V tolerant - Hardware SMBusTM (I2CTM Compatible), SPITM, and Two UART Serial Ports Available Concurrently - Programmable 16-bit Counter/Timer Array with 5 Capture/Compare Modules - 5 General Purpose 16-bit Counter/Timers - Dedicated Watch-Dog Timer; Bi-directional RESET CLOCK SOURCES - Internal Programmable Oscillator: 2-to-16MHz - External Oscillator: Crystal, RC, C, or Clock - Real-Time Clock Mode using Timer 3 or PCA SUPPLY VOLTAGE ........................ 2.7V to 3.6V - Typical Operating Current: 10mA @ 25MHz - Multiple Power Saving Sleep and Shutdown Modes 100-Pin TQFP (64-Pin Version Available) Temperature Range: –40°C to +85°C

    标签: C8051F020

    上传时间: 2013-10-12

    上传用户:lalalal

  • STC89C5X单片机“看门狗”原理、详细说明和演示程序

    “看门狗定时器”是这样一种东西,从功能上说它可以让微控制器在意外状况下(比如程序陷入死循环)重新回复到系统上电状态,以保证系统出问题的时候重启一次。就跟我们用电脑一样,死机了你就按一下RESET键重启一次电脑,看门狗就是负责干这个事儿的。它是52单片机增加的一个功能,以前Intel 8031、……、AT89C51时代单片机片内都没有“看门狗”功能,需要我们外扩看门狗芯片,比如X5045。 很多人初次接触丌太理解怎么用,书上也讲的含含糊糊,故意说的很复杂很玄妙(可能是现在写书人的通病,生怕写的简单的别人觉得他没水平)。其实要是说明白点:“看门狗”就是一个计数器,由于位数有限计数器能够装的数值是有限的(比如8位的最多装256个数、16位的最多装65536个数),从开启“看门狗”那刻起,它就开始丌停的数机器周期,数一个机器周期就计数器加1,加到计数器盛丌下了(术语叫溢出)就就产生一个复位信号,重启系统。

    标签: STC 89C 89 5X

    上传时间: 2013-11-11

    上传用户:yepeng139

  • AVR32801: UC3A3 Schematic Chec

    AVR32801: UC3A3 Schematic Checklist Features •  Power circuit •  RESET circuit •  USB connection •  External bus interface •  ABDAC sound DAC interface •  JTAG and Nexus debug ports •  Clocks and crystal oscillators •  MMC, SD-card, SDHC, SDIO and CE-ATA interface 1 Introduction A good hardware design comes from a proper schematic. Since UC3A3 devices have a fair number of pins and functions, the schematic for these devices can be large and quite complex. This application note describes a common checklist which should be used when starting and reviewing the schematics for a UC3A3 design.

    标签: Schematic 32801 UC3A3 Chec

    上传时间: 2014-12-26

    上传用户:DXM35

  • CAT93C46 器件数据手册

    The CAT93C46 is a 1 kb Serial EEPROM memory device which isconfigured as either 64 registers of 16 bits (ORG pin at VCC) or 128registers of 8 bits (ORG pin at GND). Each register can be written (orread) serially by using the DI (or DO) pin. The CAT93C46 features aself−timed internal write with auto−clear. On−chip Power−On RESETcircuit protects the internal logic against powering up in the wrongstate.

    标签: CAT 93C C46 93

    上传时间: 2013-11-19

    上传用户:ynzfm

  • NCV8508集成复位输出的LDO稳压器产品简介手册

    NCV8508是一款高精度的微功耗电源稳压器。输出电流可达250mA。该器件提供5.0V输出版本。支持RESET输出(带DELAY功能),可用于微处理器逻辑控制。当输出电压达到1.0V时,RESET电路即可正常工作。当电源上电及电压跌落于门槛电压时,RESET电路输出复位信号。芯片内置WDT看门狗功能,可以用于增强微处理器系统的可靠性。

    标签: 8508 NCV LDO 集成复位

    上传时间: 2013-11-23

    上传用户:kqc13037348641